/*
* CommitProxyServer.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <algorithm>
#include <tuple>
#include <fdbclient/DatabaseContext.h>
#include "fdbclient/Atomic.h"
#include "fdbclient/FDBTypes.h"
#include "fdbclient/Knobs.h"
#include "fdbclient/CommitProxyInterface.h"
#include "fdbclient/NativeAPI.actor.h"
#include "fdbclient/SystemData.h"
#include "fdbclient/TransactionLineage.h"
#include "fdbrpc/sim_validation.h"
#include "fdbserver/ApplyMetadataMutation.h"
#include "fdbserver/ConflictSet.h"
#include "fdbserver/DataDistributorInterface.h"
#include "fdbserver/FDBExecHelper.actor.h"
#include "fdbserver/IKeyValueStore.h"
#include "fdbserver/Knobs.h"
#include "fdbserver/LogSystem.h"
#include "fdbserver/LogSystemDiskQueueAdapter.h"
#include "fdbserver/MasterInterface.h"
#include "fdbserver/MutationTracking.h"
#include "fdbserver/ProxyCommitData.actor.h"
#include "fdbserver/RatekeeperInterface.h"
#include "fdbserver/RecoveryState.h"
#include "fdbserver/RestoreUtil.h"
#include "fdbserver/WaitFailure.h"
#include "fdbserver/WorkerInterface.actor.h"
#include "flow/ActorCollection.h"
#include "flow/IRandom.h"
#include "flow/Knobs.h"
#include "flow/Trace.h"
#include "flow/Tracing.h"
#include "flow/actorcompiler.h" // This must be the last #include.
ACTOR Future<Void> broadcastTxnRequest(TxnStateRequest req, int sendAmount, bool sendReply) {
state ReplyPromise<Void> reply = req.reply;
resetReply(req);
std::vector<Future<Void>> replies;
int currentStream = 0;
std::vector<Endpoint> broadcastEndpoints = req.broadcastInfo;
for (int i = 0; i < sendAmount && currentStream < broadcastEndpoints.size(); i++) {
std::vector<Endpoint> endpoints;
RequestStream<TxnStateRequest> cur(broadcastEndpoints[currentStream++]);
while (currentStream < broadcastEndpoints.size() * (i + 1) / sendAmount) {
endpoints.push_back(broadcastEndpoints[currentStream++]);
}
req.broadcastInfo = endpoints;
replies.push_back(brokenPromiseToNever(cur.getReply(req)));
resetReply(req);
}
wait(waitForAll(replies));
if (sendReply) {
reply.send(Void());
}
return Void();
}
ACTOR void discardCommit(UID id, Future<LogSystemDiskQueueAdapter::CommitMessage> fcm, Future<Void> dummyCommitState) {
ASSERT(!dummyCommitState.isReady());
LogSystemDiskQueueAdapter::CommitMessage cm = wait(fcm);
TraceEvent("Discarding", id).detail("Count", cm.messages.size());
cm.acknowledge.send(Void());
ASSERT(dummyCommitState.isReady());
}
struct ResolutionRequestBuilder {
ProxyCommitData* self;
std::vector<ResolveTransactionBatchRequest> requests;
std::vector<std::vector<int>> transactionResolverMap;
std::vector<CommitTransactionRef*> outTr;
std::vector<std::vector<std::vector<int>>>
txReadConflictRangeIndexMap; // Used to report conflicting keys, the format is
// [CommitTransactionRef_Index][Resolver_Index][Read_Conflict_Range_Index_on_Resolver]
// -> read_conflict_range's original index in the commitTransactionRef
ResolutionRequestBuilder(ProxyCommitData* self,
Version version,
Version prevVersion,
Version lastReceivedVersion,
Span& parentSpan)
: self(self), requests(self->resolvers.size()) {
for (auto& req : requests) {
req.spanContext = parentSpan.context;
req.prevVersion = prevVersion;
req.version = version;
req.lastReceivedVersion = lastReceivedVersion;
}
}
CommitTransactionRef& getOutTransaction(int resolver, Version read_snapshot) {
CommitTransactionRef*& out = outTr[resolver];
if (!out) {
ResolveTransactionBatchRequest& request = requests[resolver];
request.transactions.resize(request.arena, request.transactions.size() + 1);
out = &request.transactions.back();
out->read_snapshot = read_snapshot;
}
return *out;
}
void addTransaction(CommitTransactionRequest& trRequest, int transactionNumberInBatch) {
auto& trIn = trRequest.transaction;
// SOMEDAY: There are a couple of unnecessary O( # resolvers ) steps here
outTr.assign(requests.size(), nullptr);
ASSERT(transactionNumberInBatch >= 0 && transactionNumberInBatch < 32768);
bool isTXNStateTransaction = false;
for (auto& m : trIn.mutations) {
if (m.type == MutationRef::SetVersionstampedKey) {
transformVersionstampMutation(m, &MutationRef::param1, requests[0].version, transactionNumberInBatch);
trIn.write_conflict_ranges.push_back(requests[0].arena, singleKeyRange(m.param1, requests[0].arena));
} else if (m.type == MutationRef::SetVersionstampedValue) {
transformVersionstampMutation(m, &MutationRef::param2, requests[0].version, transactionNumberInBatch);
}
if (isMetadataMutation(m)) {
isTXNStateTransaction = true;
getOutTransaction(0, trIn.read_snapshot).mutations.push_back(requests[0].arena, m);
}
}
if (isTXNStateTransaction && !trRequest.isLockAware()) {
// This mitigates https://github.com/apple/foundationdb/issues/3647. Since this transaction is not lock
// aware, if this transaction got a read version then \xff/dbLocked must not have been set at this
// transaction's read snapshot. If that changes by commit time, then it won't commit on any proxy because of
// a conflict. A client could set a read version manually so this isn't totally bulletproof.
trIn.read_conflict_ranges.push_back(trRequest.arena, KeyRangeRef(databaseLockedKey, databaseLockedKeyEnd));
}
std::vector<std::vector<int>> rCRIndexMap(
requests.size()); // [resolver_index][read_conflict_range_index_on_the_resolver]
// -> read_conflict_range's original index
for (int idx = 0; idx < trIn.read_conflict_ranges.size(); ++idx) {
const auto& r = trIn.read_conflict_ranges[idx];
auto ranges = self->keyResolvers.intersectingRanges(r);
std::set<int> resolvers;
for (auto& ir : ranges) {
auto& version_resolver = ir.value();
for (int i = version_resolver.size() - 1; i >= 0; i--) {
resolvers.insert(version_resolver[i].second);
if (version_resolver[i].first < trIn.read_snapshot)
break;
}
}
ASSERT(resolvers.size());
for (int resolver : resolvers) {
getOutTransaction(resolver, trIn.read_snapshot)
.read_conflict_ranges.push_back(requests[resolver].arena, r);
rCRIndexMap[resolver].push_back(idx);
}
}
txReadConflictRangeIndexMap.push_back(std::move(rCRIndexMap));
for (auto& r : trIn.write_conflict_ranges) {
auto ranges = self->keyResolvers.intersectingRanges(r);
std::set<int> resolvers;
for (auto& ir : ranges)
resolvers.insert(ir.value().back().second);
ASSERT(resolvers.size());
for (int resolver : resolvers)
getOutTransaction(resolver, trIn.read_snapshot)
.write_conflict_ranges.push_back(requests[resolver].arena, r);
}
if (isTXNStateTransaction)
for (int r = 0; r < requests.size(); r++) {
int transactionNumberInRequest =
&getOutTransaction(r, trIn.read_snapshot) - requests[r].transactions.begin();
requests[r].txnStateTransactions.push_back(requests[r].arena, transactionNumberInRequest);
}
std::vector<int> resolversUsed;
for (int r = 0; r < outTr.size(); r++)
if (outTr[r]) {
resolversUsed.push_back(r);
outTr[r]->report_conflicting_keys = trIn.report_conflicting_keys;
}
transactionResolverMap.emplace_back(std::move(resolversUsed));
}
};
ACTOR Future<Void> commitBatcher(ProxyCommitData* commitData,
PromiseStream<std::pair<std::vector<CommitTransactionRequest>, int>> out,
FutureStream<CommitTransactionRequest> in,
int desiredBytes,
int64_t memBytesLimit) {
wait(delayJittered(commitData->commitBatchInterval, TaskPriority::ProxyCommitBatcher));
state double lastBatch = 0;
loop {
state Future<Void> timeout;
state std::vector<CommitTransactionRequest> batch;
state int batchBytes = 0;
if (SERVER_KNOBS->MAX_COMMIT_BATCH_INTERVAL <= 0) {
timeout = Never();
} else {
timeout = delayJittered(SERVER_KNOBS->MAX_COMMIT_BATCH_INTERVAL, TaskPriority::ProxyCommitBatcher);
}
while (!timeout.isReady() &&
!(batch.size() == SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_COUNT_MAX || batchBytes >= desiredBytes)) {
choose {
when(CommitTransactionRequest req = waitNext(in)) {
// WARNING: this code is run at a high priority, so it needs to do as little work as possible
int bytes = getBytes(req);
// Drop requests if memory is under severe pressure
if (commitData->commitBatchesMemBytesCount + bytes > memBytesLimit) {
++commitData->stats.txnCommitErrors;
req.reply.sendError(proxy_memory_limit_exceeded());
TraceEvent(SevWarnAlways, "ProxyCommitBatchMemoryThresholdExceeded")
.suppressFor(60)
.detail("MemBytesCount", commitData->commitBatchesMemBytesCount)
.detail("MemLimit", memBytesLimit);
continue;
}
if (bytes > FLOW_KNOBS->PACKET_WARNING) {
TraceEvent(!g_network->isSimulated() ? SevWarnAlways : SevWarn, "LargeTransaction")
.suppressFor(1.0)
.detail("Size", bytes)
.detail("Client", req.reply.getEndpoint().getPrimaryAddress());
}
++commitData->stats.txnCommitIn;
if (req.debugID.present()) {
g_traceBatch.addEvent("CommitDebug", req.debugID.get().first(), "CommitProxyServer.batcher");
}
if (!batch.size()) {
if (now() - lastBatch > commitData->commitBatchInterval) {
timeout = delayJittered(SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_INTERVAL_FROM_IDLE,
TaskPriority::ProxyCommitBatcher);
} else {
timeout = delayJittered(commitData->commitBatchInterval - (now() - lastBatch),
TaskPriority::ProxyCommitBatcher);
}
}
if ((batchBytes + bytes > CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT || req.firstInBatch()) &&
batch.size()) {
out.send({ std::move(batch), batchBytes });
lastBatch = now();
timeout = delayJittered(commitData->commitBatchInterval, TaskPriority::ProxyCommitBatcher);
batch.clear();
batchBytes = 0;
}
batch.push_back(req);
batchBytes += bytes;
commitData->commitBatchesMemBytesCount += bytes;
}
when(wait(timeout)) {}
}
}
out.send({ std::move(batch), batchBytes });
lastBatch = now();
}
}
void createWhitelistBinPathVec(const std::string& binPath, std::vector<Standalone<StringRef>>& binPathVec) {
TraceEvent(SevDebug, "BinPathConverter").detail("Input", binPath);
StringRef input(binPath);
while (input != StringRef()) {
StringRef token = input.eat(LiteralStringRef(","));
if (token != StringRef()) {
const uint8_t* ptr = token.begin();
while (ptr != token.end() && *ptr == ' ') {
ptr++;
}
if (ptr != token.end()) {
Standalone<StringRef> newElement(token.substr(ptr - token.begin()));
TraceEvent(SevDebug, "BinPathItem").detail("Element", newElement);
binPathVec.push_back(newElement);
}
}
}
return;
}
bool isWhitelisted(const std::vector<Standalone<StringRef>>& binPathVec, StringRef binPath) {
TraceEvent("BinPath").detail("Value", binPath);
for (const auto& item : binPathVec) {
TraceEvent("Element").detail("Value", item);
}
return std::find(binPathVec.begin(), binPathVec.end(), binPath) != binPathVec.end();
}
ACTOR Future<Void> addBackupMutations(ProxyCommitData* self,
const std::map<Key, MutationListRef>* logRangeMutations,
LogPushData* toCommit,
Version commitVersion,
double* computeDuration,
double* computeStart) {
state std::map<Key, MutationListRef>::const_iterator logRangeMutation = logRangeMutations->cbegin();
state int32_t version = commitVersion / CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE;
state int yieldBytes = 0;
state BinaryWriter valueWriter(Unversioned());
toCommit->addTransactionInfo(SpanID());
// Serialize the log range mutations within the map
for (; logRangeMutation != logRangeMutations->cend(); ++logRangeMutation) {
// FIXME: this is re-implementing the serialize function of MutationListRef in order to have a yield
valueWriter = BinaryWriter(IncludeVersion(ProtocolVersion::withBackupMutations()));
valueWriter << logRangeMutation->second.totalSize();
state MutationListRef::Blob* blobIter = logRangeMutation->second.blob_begin;
while (blobIter) {
if (yieldBytes > SERVER_KNOBS->DESIRED_TOTAL_BYTES) {
yieldBytes = 0;
if (g_network->check_yield(TaskPriority::ProxyCommitYield1)) {
*computeDuration += g_network->timer() - *computeStart;
wait(delay(0, TaskPriority::ProxyCommitYield1));
*computeStart = g_network->timer();
}
}
valueWriter.serializeBytes(blobIter->data);
yieldBytes += blobIter->data.size();
blobIter = blobIter->next;
}
Key val = valueWriter.toValue();
BinaryWriter wr(Unversioned());
// Serialize the log destination
wr.serializeBytes(logRangeMutation->first);
// Write the log keys and version information
wr << (uint8_t)hashlittle(&version, sizeof(version), 0);
wr << bigEndian64(commitVersion);
MutationRef backupMutation;
backupMutation.type = MutationRef::SetValue;
uint32_t* partBuffer = nullptr;
for (int part = 0; part * CLIENT_KNOBS->MUTATION_BLOCK_SIZE < val.size(); part++) {
// Assign the second parameter as the part
backupMutation.param2 = val.substr(
part * CLIENT_KNOBS->MUTATION_BLOCK_SIZE,
std::min(val.size() - part * CLIENT_KNOBS->MUTATION_BLOCK_SIZE, CLIENT_KNOBS->MUTATION_BLOCK_SIZE));
// Write the last part of the mutation to the serialization, if the buffer is not defined
if (!partBuffer) {
// Serialize the part to the writer
wr << bigEndian32(part);
// Define the last buffer part
partBuffer = (uint32_t*)((char*)wr.getData() + wr.getLength() - sizeof(uint32_t));
} else {
*partBuffer = bigEndian32(part);
}
// Define the mutation type and and location
backupMutation.param1 = wr.toValue();
ASSERT(backupMutation.param1.startsWith(
logRangeMutation->first)); // We are writing into the configured destination
auto& tags = self->tagsForKey(backupMutation.param1);
toCommit->addTags(tags);
toCommit->writeTypedMessage(backupMutation);
// if (DEBUG_MUTATION("BackupProxyCommit", commitVersion, backupMutation)) {
// TraceEvent("BackupProxyCommitTo", self->dbgid).detail("To",
// describe(tags)).detail("BackupMutation", backupMutation.toString())
// .detail("BackupMutationSize", val.size()).detail("Version", commitVersion).detail("DestPath",
// logRangeMutation.first) .detail("PartIndex", part).detail("PartIndexEndian",
// bigEndian32(part)).detail("PartData", backupMutation.param1);
// }
}
}
return Void();
}
ACTOR Future<Void> releaseResolvingAfter(ProxyCommitData* self, Future<Void> releaseDelay, int64_t localBatchNumber) {
wait(releaseDelay);
ASSERT(self->latestLocalCommitBatchResolving.get() == localBatchNumber - 1);
self->latestLocalCommitBatchResolving.set(localBatchNumber);
return Void();
}
ACTOR static Future<ResolveTransactionBatchReply> trackResolutionMetrics(Reference<Histogram> dist,
Future<ResolveTransactionBatchReply> in) {
state double startTime = now();
ResolveTransactionBatchReply reply = wait(in);
dist->sampleSeconds(now() - startTime);
return reply;
}
namespace CommitBatch {
struct CommitBatchContext {
using StoreCommit_t = std::vector<std::pair<Future<LogSystemDiskQueueAdapter::CommitMessage>, Future<Void>>>;
ProxyCommitData* const pProxyCommitData;
std::vector<CommitTransactionRequest> trs;
int currentBatchMemBytesCount;
double startTime;
Optional<UID> debugID;
bool forceRecovery = false;
bool rejected = false; // If rejected due to long queue length
int64_t localBatchNumber;
LogPushData toCommit;
int batchOperations = 0;
Span span;
int64_t batchBytes = 0;
int latencyBucket = 0;
Version commitVersion;
Version prevVersion;
int64_t maxTransactionBytes;
std::vector<std::vector<int>> transactionResolverMap;
std::vector<std::vector<std::vector<int>>> txReadConflictRangeIndexMap;
Future<Void> releaseDelay;
Future<Void> releaseFuture;
std::vector<ResolveTransactionBatchReply> resolution;
double computeStart;
double computeDuration = 0;
Arena arena;
/// true if the batch is the 1st batch for this proxy, additional metadata
/// processing is involved for this batch.
bool isMyFirstBatch;
bool firstStateMutations;
Optional<Value> oldCoordinators;
StoreCommit_t storeCommits;
std::vector<uint8_t> committed;
Optional<Key> lockedKey;
bool locked;
int commitCount = 0;
std::vector<int> nextTr;
bool lockedAfter;
Optional<Value> metadataVersionAfter;
int mutationCount = 0;
int mutationBytes = 0;
std::map<Key, MutationListRef> logRangeMutations;
Arena logRangeMutationsArena;
int transactionNum = 0;
int yieldBytes = 0;
LogSystemDiskQueueAdapter::CommitMessage msg;
Future<Version> loggingComplete;
double commitStartTime;
CommitBatchContext(ProxyCommitData*, const std::vector<CommitTransactionRequest>*, const int);
void setupTraceBatch();
private:
void evaluateBatchSize();
};
CommitBatchContext::CommitBatchContext(ProxyCommitData* const pProxyCommitData_,
const std::vector<CommitTransactionRequest>* trs_,
const int currentBatchMemBytesCount)
:
pProxyCommitData(pProxyCommitData_), trs(std::move(*const_cast<std::vector<CommitTransactionRequest>*>(trs_))),
currentBatchMemBytesCount(currentBatchMemBytesCount),
startTime(g_network->now()),
localBatchNumber(++pProxyCommitData->localCommitBatchesStarted), toCommit(pProxyCommitData->logSystem),
span("MP:commitBatch"_loc), committed(trs.size()) {
evaluateBatchSize();
if (batchOperations != 0) {
latencyBucket =
std::min<int>(SERVER_KNOBS->PROXY_COMPUTE_BUCKETS - 1,
SERVER_KNOBS->PROXY_COMPUTE_BUCKETS * batchBytes /
(batchOperations * (CLIENT_KNOBS->VALUE_SIZE_LIMIT + CLIENT_KNOBS->KEY_SIZE_LIMIT)));
}
// since we are using just the former to limit the number of versions actually in flight!
ASSERT(SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS <= SERVER_KNOBS->MAX_VERSIONS_IN_FLIGHT);
}
void CommitBatchContext::setupTraceBatch() {
for (const auto& tr : trs) {
if (tr.debugID.present()) {
if (!debugID.present()) {
debugID = nondeterministicRandom()->randomUniqueID();
}
g_traceBatch.addAttach("CommitAttachID", tr.debugID.get().first(), debugID.get().first());
}
span.addParent(tr.spanContext);
}
if (debugID.present()) {
g_traceBatch.addEvent("CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.Before");
}
}
void CommitBatchContext::evaluateBatchSize() {
for (const auto& tr : trs) {
const auto& mutations = tr.transaction.mutations;
batchOperations += mutations.size();
batchBytes += mutations.expectedSize();
}
}
// Try to identify recovery transaction and backup's apply mutations (blind writes).
// Both cannot be rejected and are approximated by looking at first mutation
// starting with 0xff.
bool canReject(const std::vector<CommitTransactionRequest>& trs) {
for (const auto& tr : trs) {
if (tr.transaction.mutations.empty())
continue;
if (tr.transaction.mutations[0].param1.startsWith(LiteralStringRef("\xff")) ||
tr.transaction.read_conflict_ranges.empty()) {
return false;
}
}
return true;
}
ACTOR Future<Void> preresolutionProcessing(CommitBatchContext* self) {
state ProxyCommitData* const pProxyCommitData = self->pProxyCommitData;
state std::vector<CommitTransactionRequest>& trs = self->trs;
state const int64_t localBatchNumber = self->localBatchNumber;
state const int latencyBucket = self->latencyBucket;
state const Optional<UID>& debugID = self->debugID;
state Span span("MP:preresolutionProcessing"_loc, self->span.context);
state double timeStart = now();
if (self->localBatchNumber - self->pProxyCommitData->latestLocalCommitBatchResolving.get() >
SERVER_KNOBS->RESET_MASTER_BATCHES &&
now() - self->pProxyCommitData->lastMasterReset > SERVER_KNOBS->RESET_MASTER_DELAY) {
TraceEvent(SevWarnAlways, "ResetMasterNetwork", self->pProxyCommitData->dbgid)
.detail("CurrentBatch", self->localBatchNumber)
.detail("InProcessBatch", self->pProxyCommitData->latestLocalCommitBatchResolving.get());
FlowTransport::transport().resetConnection(self->pProxyCommitData->master.address());
self->pProxyCommitData->lastMasterReset = now();
}
// Pre-resolution the commits
TEST(pProxyCommitData->latestLocalCommitBatchResolving.get() < localBatchNumber - 1); // Wait for local batch
wait(pProxyCommitData->latestLocalCommitBatchResolving.whenAtLeast(localBatchNumber - 1));
double queuingDelay = g_network->now() - timeStart;
pProxyCommitData->stats.commitBatchQueuingDist->sampleSeconds(queuingDelay);
if ((queuingDelay > (double)SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS / SERVER_KNOBS->VERSIONS_PER_SECOND ||
(g_network->isSimulated() && BUGGIFY_WITH_PROB(0.01))) &&
SERVER_KNOBS->PROXY_REJECT_BATCH_QUEUED_TOO_LONG && canReject(trs)) {
// Disabled for the recovery transaction. otherwise, recovery can't finish and keeps doing more recoveries.
TEST(true); // Reject transactions in the batch
TraceEvent(SevWarnAlways, "ProxyReject", pProxyCommitData->dbgid)
.suppressFor(0.1)
.detail("QDelay", queuingDelay)
.detail("Transactions", trs.size())
.detail("BatchNumber", localBatchNumber);
ASSERT(pProxyCommitData->latestLocalCommitBatchResolving.get() == localBatchNumber - 1);
pProxyCommitData->latestLocalCommitBatchResolving.set(localBatchNumber);
wait(pProxyCommitData->latestLocalCommitBatchLogging.whenAtLeast(localBatchNumber - 1));
ASSERT(pProxyCommitData->latestLocalCommitBatchLogging.get() == localBatchNumber - 1);
pProxyCommitData->latestLocalCommitBatchLogging.set(localBatchNumber);
for (const auto& tr : trs) {
tr.reply.sendError(transaction_too_old());
}
++pProxyCommitData->stats.commitBatchOut;
pProxyCommitData->stats.txnCommitOut += trs.size();
pProxyCommitData->stats.txnRejectedForQueuedTooLong += trs.size();
self->rejected = true;
return Void();
}
self->releaseDelay =
delay(std::min(SERVER_KNOBS->MAX_PROXY_COMPUTE,
self->batchOperations * pProxyCommitData->commitComputePerOperation[latencyBucket]),
TaskPriority::ProxyMasterVersionReply);
if (debugID.present()) {
g_traceBatch.addEvent(
"CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.GettingCommitVersion");
}
GetCommitVersionRequest req(span.context,
pProxyCommitData->commitVersionRequestNumber++,
pProxyCommitData->mostRecentProcessedRequestNumber,
pProxyCommitData->dbgid);
state double beforeGettingCommitVersion = now();
GetCommitVersionReply versionReply = wait(brokenPromiseToNever(
pProxyCommitData->master.getCommitVersion.getReply(req, TaskPriority::ProxyMasterVersionReply)));
pProxyCommitData->mostRecentProcessedRequestNumber = versionReply.requestNum;
pProxyCommitData->stats.txnCommitVersionAssigned += trs.size();
pProxyCommitData->stats.lastCommitVersionAssigned = versionReply.version;
pProxyCommitData->stats.getCommitVersionDist->sampleSeconds(now() - beforeGettingCommitVersion);
self->commitVersion = versionReply.version;
self->prevVersion = versionReply.prevVersion;
//TraceEvent("CPGetVersion", pProxyCommitData->dbgid).detail("Master", pProxyCommitData->master.id().toString()).detail("CommitVersion", self->commitVersion).detail("PrvVersion", self->prevVersion);
for (auto it : versionReply.resolverChanges) {
auto rs = pProxyCommitData->keyResolvers.modify(it.range);
for (auto r = rs.begin(); r != rs.end(); ++r)
r->value().emplace_back(versionReply.resolverChangesVersion, it.dest);
}
//TraceEvent("ProxyGotVer", pProxyContext->dbgid).detail("Commit", commitVersion).detail("Prev", prevVersion);
if (debugID.present()) {
g_traceBatch.addEvent("CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.GotCommitVersion");
}
return Void();
}
ACTOR Future<Void> getResolution(CommitBatchContext* self) {
state double resolutionStart = now();
// Sending these requests is the fuzzy border between phase 1 and phase 2; it could conceivably overlap with
// resolution processing but is still using CPU
ProxyCommitData* pProxyCommitData = self->pProxyCommitData;
std::vector<CommitTransactionRequest>& trs = self->trs;
state Span span("MP:getResolution"_loc, self->span.context);
ResolutionRequestBuilder requests(
pProxyCommitData, self->commitVersion, self->prevVersion, pProxyCommitData->version, span);
int conflictRangeCount = 0;
self->maxTransactionBytes = 0;
for (int t = 0; t < trs.size(); t++) {
requests.addTransaction(trs[t], t);
conflictRangeCount +=
trs[t].transaction.read_conflict_ranges.size() + trs[t].transaction.write_conflict_ranges.size();
//TraceEvent("MPTransactionDump", self->dbgid).detail("Snapshot", trs[t].transaction.read_snapshot);
// for(auto& m : trs[t].transaction.mutations)
self->maxTransactionBytes = std::max<int64_t>(self->maxTransactionBytes, trs[t].transaction.expectedSize());
// TraceEvent("MPTransactionsDump", self->dbgid).detail("Mutation", m.toString());
}
pProxyCommitData->stats.conflictRanges += conflictRangeCount;
for (int r = 1; r < pProxyCommitData->resolvers.size(); r++)
ASSERT(requests.requests[r].txnStateTransactions.size() == requests.requests[0].txnStateTransactions.size());
pProxyCommitData->stats.txnCommitResolving += trs.size();
std::vector<Future<ResolveTransactionBatchReply>> replies;
for (int r = 0; r < pProxyCommitData->resolvers.size(); r++) {
requests.requests[r].debugID = self->debugID;
replies.push_back(trackResolutionMetrics(pProxyCommitData->stats.resolverDist[r],
brokenPromiseToNever(pProxyCommitData->resolvers[r].resolve.getReply(
requests.requests[r], TaskPriority::ProxyResolverReply))));
}
self->transactionResolverMap.swap(requests.transactionResolverMap);
// Used to report conflicting keys
self->txReadConflictRangeIndexMap.swap(requests.txReadConflictRangeIndexMap);
self->releaseFuture = releaseResolvingAfter(pProxyCommitData, self->releaseDelay, self->localBatchNumber);
if (self->localBatchNumber - self->pProxyCommitData->latestLocalCommitBatchLogging.get() >
SERVER_KNOBS->RESET_RESOLVER_BATCHES &&
now() - self->pProxyCommitData->lastResolverReset > SERVER_KNOBS->RESET_RESOLVER_DELAY) {
for (int r = 0; r < self->pProxyCommitData->resolvers.size(); r++) {
TraceEvent(SevWarnAlways, "ResetResolverNetwork", self->pProxyCommitData->dbgid)
.detail("PeerAddr", self->pProxyCommitData->resolvers[r].address())
.detail("CurrentBatch", self->localBatchNumber)
.detail("InProcessBatch", self->pProxyCommitData->latestLocalCommitBatchLogging.get());
FlowTransport::transport().resetConnection(self->pProxyCommitData->resolvers[r].address());
}
self->pProxyCommitData->lastResolverReset = now();
}
// Wait for the final resolution
std::vector<ResolveTransactionBatchReply> resolutionResp = wait(getAll(replies));
self->resolution.swap(*const_cast<std::vector<ResolveTransactionBatchReply>*>(&resolutionResp));
self->pProxyCommitData->stats.resolutionDist->sampleSeconds(now() - resolutionStart);
if (self->debugID.present()) {
g_traceBatch.addEvent(
"CommitDebug", self->debugID.get().first(), "CommitProxyServer.commitBatch.AfterResolution");
}
return Void();
}
void assertResolutionStateMutationsSizeConsistent(const std::vector<ResolveTransactionBatchReply>& resolution) {
for (int r = 1; r < resolution.size(); r++) {
ASSERT(resolution[r].stateMutations.size() == resolution[0].stateMutations.size());
for (int s = 0; s < resolution[r].stateMutations.size(); s++) {
ASSERT(resolution[r].stateMutations[s].size() == resolution[0].stateMutations[s].size());
}
}
}
// Compute and apply "metadata" effects of each other proxy's most recent batch
void applyMetadataEffect(CommitBatchContext* self) {
bool initialState = self->isMyFirstBatch;
self->firstStateMutations = self->isMyFirstBatch;
for (int versionIndex = 0; versionIndex < self->resolution[0].stateMutations.size(); versionIndex++) {
// pProxyCommitData->logAdapter->setNextVersion( ??? ); << Ideally we would be telling the log adapter that the
// pushes in this commit will be in the version at which these state mutations were committed by another proxy,
// but at present we don't have that information here. So the disk queue may be unnecessarily conservative
// about popping.
for (int transactionIndex = 0;
transactionIndex < self->resolution[0].stateMutations[versionIndex].size() && !self->forceRecovery;
transactionIndex++) {
bool committed = true;
for (int resolver = 0; resolver < self->resolution.size(); resolver++)
committed =
committed && self->resolution[resolver].stateMutations[versionIndex][transactionIndex].committed;
if (committed) {
applyMetadataMutations(SpanID(),
*self->pProxyCommitData,
self->arena,
self->pProxyCommitData->logSystem,
self->resolution[0].stateMutations[versionIndex][transactionIndex].mutations,
/* pToCommit= */ nullptr,
self->forceRecovery,
/* popVersion= */ 0,
/* initialCommit */ false);
}
if (self->resolution[0].stateMutations[versionIndex][transactionIndex].mutations.size() &&
self->firstStateMutations) {
ASSERT(committed);
self->firstStateMutations = false;
self->forceRecovery = false;
}
}
// These changes to txnStateStore will be committed by the other proxy, so we simply discard the commit message
auto fcm = self->pProxyCommitData->logAdapter->getCommitMessage();
self->storeCommits.emplace_back(fcm, self->pProxyCommitData->txnStateStore->commit());
if (initialState) {
initialState = false;
self->forceRecovery = false;
self->pProxyCommitData->txnStateStore->resyncLog();
for (auto& p : self->storeCommits) {
ASSERT(!p.second.isReady());
p.first.get().acknowledge.send(Void());
ASSERT(p.second.isReady());
}
self->storeCommits.clear();
}
}
}
/// Determine which transactions actually committed (conservatively) by combining results from the resolvers
void determineCommittedTransactions(CommitBatchContext* self) {
auto pProxyCommitData = self->pProxyCommitData;
const auto& trs = self->trs;
ASSERT(self->transactionResolverMap.size() == self->committed.size());
// For each commitTransactionRef, it is only sent to resolvers specified in transactionResolverMap
// Thus, we use this nextTr to track the correct transaction index on each resolver.
self->nextTr.resize(self->resolution.size());
for (int t = 0; t < trs.size(); t++) {
uint8_t commit = ConflictBatch::TransactionCommitted;
for (int r : self->transactionResolverMap[t]) {
commit = std::min(self->resolution[r].committed[self->nextTr[r]++], commit);
}
self->committed[t] = commit;
}
for (int r = 0; r < self->resolution.size(); r++)
ASSERT(self->nextTr[r] == self->resolution[r].committed.size());
pProxyCommitData->logAdapter->setNextVersion(self->commitVersion);
self->lockedKey = pProxyCommitData->txnStateStore->readValue(databaseLockedKey).get();
self->locked = self->lockedKey.present() && self->lockedKey.get().size();
const Optional<Value> mustContainSystemKey =
pProxyCommitData->txnStateStore->readValue(mustContainSystemMutationsKey).get();
if (mustContainSystemKey.present() && mustContainSystemKey.get().size()) {
for (int t = 0; t < trs.size(); t++) {
if (self->committed[t] == ConflictBatch::TransactionCommitted) {
bool foundSystem = false;
for (auto& m : trs[t].transaction.mutations) {
if ((m.type == MutationRef::ClearRange ? m.param2 : m.param1) >= nonMetadataSystemKeys.end) {
foundSystem = true;
break;
}
}
if (!foundSystem) {
self->committed[t] = ConflictBatch::TransactionConflict;
}
}
}
}
}
// This first pass through committed transactions deals with "metadata" effects (modifications of txnStateStore, changes
// to storage servers' responsibilities)
ACTOR Future<Void> applyMetadataToCommittedTransactions(CommitBatchContext* self) {
auto pProxyCommitData = self->pProxyCommitData;
const auto& trs = self->trs;
int t;
for (t = 0; t < trs.size() && !self->forceRecovery; t++) {
if (self->committed[t] == ConflictBatch::TransactionCommitted && (!self->locked || trs[t].isLockAware())) {
self->commitCount++;
applyMetadataMutations(trs[t].spanContext,
*pProxyCommitData,
self->arena,
pProxyCommitData->logSystem,
trs[t].transaction.mutations,
&self->toCommit,
self->forceRecovery,
self->commitVersion + 1,
/* initialCommit= */ false);
}
if (self->firstStateMutations) {
ASSERT(self->committed[t] == ConflictBatch::TransactionCommitted);
self->firstStateMutations = false;
self->forceRecovery = false;
}
}
if (self->forceRecovery) {
for (; t < trs.size(); t++)
self->committed[t] = ConflictBatch::TransactionConflict;
TraceEvent(SevWarn, "RestartingTxnSubsystem", pProxyCommitData->dbgid).detail("Stage", "AwaitCommit");
}
self->lockedKey = pProxyCommitData->txnStateStore->readValue(databaseLockedKey).get();
self->lockedAfter = self->lockedKey.present() && self->lockedKey.get().size();
self->metadataVersionAfter = pProxyCommitData->txnStateStore->readValue(metadataVersionKey).get();
auto fcm = pProxyCommitData->logAdapter->getCommitMessage();
self->storeCommits.emplace_back(fcm, pProxyCommitData->txnStateStore->commit());
pProxyCommitData->version = self->commitVersion;
if (!pProxyCommitData->validState.isSet())
pProxyCommitData->validState.send(Void());
ASSERT(self->commitVersion);
if (!self->isMyFirstBatch &&
pProxyCommitData->txnStateStore->readValue(coordinatorsKey).get().get() != self->oldCoordinators.get()) {
wait(brokenPromiseToNever(pProxyCommitData->db->get().clusterInterface.changeCoordinators.getReply(
ChangeCoordinatorsRequest(pProxyCommitData->txnStateStore->readValue(coordinatorsKey).get().get()))));
ASSERT(false); // ChangeCoordinatorsRequest should always throw
}
return Void();
}
/// This second pass through committed transactions assigns the actual mutations to the appropriate storage servers'
/// tags
ACTOR Future<Void> assignMutationsToStorageServers(CommitBatchContext* self) {
state ProxyCommitData* const pProxyCommitData = self->pProxyCommitData;
state std::vector<CommitTransactionRequest>& trs = self->trs;
for (; self->transactionNum < trs.size(); self->transactionNum++) {
if (!(self->committed[self->transactionNum] == ConflictBatch::TransactionCommitted &&
(!self->locked || trs[self->transactionNum].isLockAware()))) {
continue;
}
state bool checkSample = trs[self->transactionNum].commitCostEstimation.present();
state Optional<ClientTrCommitCostEstimation>* trCost = &trs[self->transactionNum].commitCostEstimation;
state int mutationNum = 0;
state VectorRef<MutationRef>* pMutations = &trs[self->transactionNum].transaction.mutations;
self->toCommit.addTransactionInfo(trs[self->transactionNum].spanContext);
for (; mutationNum < pMutations->size(); mutationNum++) {
if (self->yieldBytes > SERVER_KNOBS->DESIRED_TOTAL_BYTES) {
self->yieldBytes = 0;
if (g_network->check_yield(TaskPriority::ProxyCommitYield1)) {
self->computeDuration += g_network->timer() - self->computeStart;
wait(delay(0, TaskPriority::ProxyCommitYield1));
self->computeStart = g_network->timer();
}
}
auto& m = (*pMutations)[mutationNum];
self->mutationCount++;
self->mutationBytes += m.expectedSize();
self->yieldBytes += m.expectedSize();
// Determine the set of tags (responsible storage servers) for the mutation, splitting it
// if necessary. Serialize (splits of) the mutation into the message buffer and add the tags.
if (isSingleKeyMutation((MutationRef::Type)m.type)) {
auto& tags = pProxyCommitData->tagsForKey(m.param1);
// sample single key mutation based on cost
// the expectation of sampling is every COMMIT_SAMPLE_COST sample once
if (checkSample) {
double totalCosts = trCost->get().writeCosts;
double cost = getWriteOperationCost(m.expectedSize());
double mul = std::max(1.0, totalCosts / std::max(1.0, (double)CLIENT_KNOBS->COMMIT_SAMPLE_COST));
ASSERT(totalCosts > 0);
double prob = mul * cost / totalCosts;
if (deterministicRandom()->random01() < prob) {
for (const auto& ssInfo : pProxyCommitData->keyInfo[m.param1].src_info) {
auto id = ssInfo->interf.id();
// scale cost
cost = cost < CLIENT_KNOBS->COMMIT_SAMPLE_COST ? CLIENT_KNOBS->COMMIT_SAMPLE_COST : cost;
pProxyCommitData->updateSSTagCost(id, trs[self->transactionNum].tagSet.get(), m, cost);
}
}
}
if (pProxyCommitData->singleKeyMutationEvent->enabled) {
KeyRangeRef shard = pProxyCommitData->keyInfo.rangeContaining(m.param1).range();
pProxyCommitData->singleKeyMutationEvent->tag1 = (int64_t)tags[0].id;
pProxyCommitData->singleKeyMutationEvent->tag2 = (int64_t)tags[1].id;
pProxyCommitData->singleKeyMutationEvent->tag3 = (int64_t)tags[2].id;
pProxyCommitData->singleKeyMutationEvent->shardBegin = shard.begin;
pProxyCommitData->singleKeyMutationEvent->shardEnd = shard.end;
pProxyCommitData->singleKeyMutationEvent->log();
}
DEBUG_MUTATION("ProxyCommit", self->commitVersion, m, pProxyCommitData->dbgid).detail("To", tags);
self->toCommit.addTags(tags);
if (pProxyCommitData->cacheInfo[m.param1]) {
self->toCommit.addTag(cacheTag);
}
self->toCommit.writeTypedMessage(m);
} else if (m.type == MutationRef::ClearRange) {
KeyRangeRef clearRange(KeyRangeRef(m.param1, m.param2));
auto ranges = pProxyCommitData->keyInfo.intersectingRanges(clearRange);
auto firstRange = ranges.begin();
++firstRange;
if (firstRange == ranges.end()) {
// Fast path
DEBUG_MUTATION("ProxyCommit", self->commitVersion, m, pProxyCommitData->dbgid)
.detail("To", ranges.begin().value().tags);
ranges.begin().value().populateTags();
self->toCommit.addTags(ranges.begin().value().tags);
// check whether clear is sampled
if (checkSample && !trCost->get().clearIdxCosts.empty() &&
trCost->get().clearIdxCosts[0].first == mutationNum) {
for (const auto& ssInfo : ranges.begin().value().src_info) {
auto id = ssInfo->interf.id();
pProxyCommitData->updateSSTagCost(
id, trs[self->transactionNum].tagSet.get(), m, trCost->get().clearIdxCosts[0].second);
}
trCost->get().clearIdxCosts.pop_front();
}
} else {
TEST(true); // A clear range extends past a shard boundary
std::set<Tag> allSources;
for (auto r : ranges) {
r.value().populateTags();
allSources.insert(r.value().tags.begin(), r.value().tags.end());
// check whether clear is sampled
if (checkSample && !trCost->get().clearIdxCosts.empty() &&
trCost->get().clearIdxCosts[0].first == mutationNum) {
for (const auto& ssInfo : r.value().src_info) {
auto id = ssInfo->interf.id();
pProxyCommitData->updateSSTagCost(id,
trs[self->transactionNum].tagSet.get(),
m,
trCost->get().clearIdxCosts[0].second);
}
trCost->get().clearIdxCosts.pop_front();
}
}
DEBUG_MUTATION("ProxyCommit", self->commitVersion, m, pProxyCommitData->dbgid)
.detail("To", allSources);
self->toCommit.addTags(allSources);
}
if (pProxyCommitData->needsCacheTag(clearRange)) {
self->toCommit.addTag(cacheTag);
}
self->toCommit.writeTypedMessage(m);
} else {
UNREACHABLE();
}
// Check on backing up key, if backup ranges are defined and a normal key
if (!(pProxyCommitData->vecBackupKeys.size() > 1 &&
(normalKeys.contains(m.param1) || m.param1 == metadataVersionKey))) {
continue;
}
if (m.type != MutationRef::Type::ClearRange) {
// Add the mutation to the relevant backup tag
for (auto backupName : pProxyCommitData->vecBackupKeys[m.param1]) {
self->logRangeMutations[backupName].push_back_deep(self->logRangeMutationsArena, m);
}
} else {
KeyRangeRef mutationRange(m.param1, m.param2);
KeyRangeRef intersectionRange;
// Identify and add the intersecting ranges of the mutation to the array of mutations to serialize
for (auto backupRange : pProxyCommitData->vecBackupKeys.intersectingRanges(mutationRange)) {
// Get the backup sub range
const auto& backupSubrange = backupRange.range();
// Determine the intersecting range
intersectionRange = mutationRange & backupSubrange;
// Create the custom mutation for the specific backup tag
MutationRef backupMutation(
MutationRef::Type::ClearRange, intersectionRange.begin, intersectionRange.end);
// Add the mutation to the relevant backup tag
for (auto backupName : backupRange.value()) {
self->logRangeMutations[backupName].push_back_deep(self->logRangeMutationsArena,
backupMutation);
}
}
}
}
if (checkSample) {
self->pProxyCommitData->stats.txnExpensiveClearCostEstCount +=
trs[self->transactionNum].commitCostEstimation.get().expensiveCostEstCount;
}
}
return Void();
}
ACTOR Future<Void> postResolution(CommitBatchContext* self) {
state double postResolutionStart = now();
state ProxyCommitData* const pProxyCommitData = self->pProxyCommitData;
state std::vector<CommitTransactionRequest>& trs = self->trs;
state const int64_t localBatchNumber = self->localBatchNumber;
state const Optional<UID>& debugID = self->debugID;
state Span span("MP:postResolution"_loc, self->span.context);
bool queuedCommits = pProxyCommitData->latestLocalCommitBatchLogging.get() < localBatchNumber - 1;
TEST(queuedCommits); // Queuing post-resolution commit processing
wait(pProxyCommitData->latestLocalCommitBatchLogging.whenAtLeast(localBatchNumber - 1));
state double postResolutionQueuing = now();
pProxyCommitData->stats.postResolutionDist->sampleSeconds(postResolutionQueuing - postResolutionStart);
wait(yield(TaskPriority::ProxyCommitYield1));
self->computeStart = g_network->timer();
pProxyCommitData->stats.txnCommitResolved += trs.size();
if (debugID.present()) {
g_traceBatch.addEvent(
"CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.ProcessingMutations");
}
self->isMyFirstBatch = !pProxyCommitData->version;
self->oldCoordinators = pProxyCommitData->txnStateStore->readValue(coordinatorsKey).get();
assertResolutionStateMutationsSizeConsistent(self->resolution);
applyMetadataEffect(self);
if (debugID.present()) {
g_traceBatch.addEvent("CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.ApplyMetadaEffect");
}
determineCommittedTransactions(self);
if (debugID.present()) {
g_traceBatch.addEvent("CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.ApplyMetadaEffect");
}
if (self->forceRecovery) {
wait(Future<Void>(Never()));
}
// First pass
wait(applyMetadataToCommittedTransactions(self));
if (debugID.present()) {
g_traceBatch.addEvent(
"CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.ApplyMetadaToCommittedTxn");
}
// Second pass
wait(assignMutationsToStorageServers(self));
if (debugID.present()) {
g_traceBatch.addEvent("CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.AssignMutationToSS");
}
// Serialize and backup the mutations as a single mutation
if ((pProxyCommitData->vecBackupKeys.size() > 1) && self->logRangeMutations.size()) {
wait(addBackupMutations(pProxyCommitData,
&self->logRangeMutations,
&self->toCommit,
self->commitVersion,
&self->computeDuration,
&self->computeStart));
}
pProxyCommitData->stats.mutations += self->mutationCount;
pProxyCommitData->stats.mutationBytes += self->mutationBytes;
// Storage servers mustn't make durable versions which are not fully committed (because then they are impossible to
// roll back) We prevent this by limiting the number of versions which are semi-committed but not fully committed to
// be less than the MVCC window
if (pProxyCommitData->committedVersion.get() <
self->commitVersion - SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS) {
self->computeDuration += g_network->timer() - self->computeStart;
state Span waitVersionSpan;
while (pProxyCommitData->committedVersion.get() <
self->commitVersion - SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS) {
// This should be *extremely* rare in the real world, but knob buggification should make it happen in
// simulation
TEST(true); // Semi-committed pipeline limited by MVCC window
//TraceEvent("ProxyWaitingForCommitted", pProxyCommitData->dbgid).detail("CommittedVersion", pProxyCommitData->committedVersion.get()).detail("NeedToCommit", commitVersion);
waitVersionSpan = Span(
deterministicRandom()->randomUniqueID(), "MP:overMaxReadTransactionLifeVersions"_loc, { span.context });
choose {
when(wait(pProxyCommitData->committedVersion.whenAtLeast(
self->commitVersion - SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS))) {
wait(yield());
break;
}
when(wait(pProxyCommitData->cx->onProxiesChanged())) {}
when(GetRawCommittedVersionReply v = wait(pProxyCommitData->master.getLiveCommittedVersion.getReply(
GetRawCommittedVersionRequest(waitVersionSpan.context, debugID),
TaskPriority::GetLiveCommittedVersionReply))) {
if (v.version > pProxyCommitData->committedVersion.get()) {
pProxyCommitData->locked = v.locked;
pProxyCommitData->metadataVersion = v.metadataVersion;
pProxyCommitData->committedVersion.set(v.version);
}
if (pProxyCommitData->committedVersion.get() <
self->commitVersion - SERVER_KNOBS->MAX_READ_TRANSACTION_LIFE_VERSIONS)
wait(delay(SERVER_KNOBS->PROXY_SPIN_DELAY));
}
}
}
waitVersionSpan = Span{};
self->computeStart = g_network->timer();
}
self->msg = self->storeCommits.back().first.get();
if (self->debugID.present())
g_traceBatch.addEvent(
"CommitDebug", self->debugID.get().first(), "CommitProxyServer.commitBatch.AfterStoreCommits");
// txnState (transaction subsystem state) tag: message extracted from log adapter
bool firstMessage = true;
for (auto m : self->msg.messages) {
if (firstMessage) {
self->toCommit.addTxsTag();
}
self->toCommit.writeMessage(StringRef(m.begin(), m.size()), !firstMessage);
firstMessage = false;
}
if (self->prevVersion && self->commitVersion - self->prevVersion < SERVER_KNOBS->MAX_VERSIONS_IN_FLIGHT / 2)
debug_advanceMaxCommittedVersion(UID(), self->commitVersion); //< Is this valid?
//TraceEvent("ProxyPush", pProxyCommitData->dbgid).detail("PrevVersion", prevVersion).detail("Version", commitVersion)
// .detail("TransactionsSubmitted", trs.size()).detail("TransactionsCommitted", commitCount).detail("TxsPopTo",
// msg.popTo);
if (self->prevVersion && self->commitVersion - self->prevVersion < SERVER_KNOBS->MAX_VERSIONS_IN_FLIGHT / 2)
debug_advanceMaxCommittedVersion(UID(), self->commitVersion);
self->commitStartTime = now();
pProxyCommitData->lastStartCommit = self->commitStartTime;
self->loggingComplete = pProxyCommitData->logSystem->push(self->prevVersion,
self->commitVersion,
pProxyCommitData->committedVersion.get(),
pProxyCommitData->minKnownCommittedVersion,
self->toCommit,
span.context,
self->debugID);
float ratio = self->toCommit.getEmptyMessageRatio();
pProxyCommitData->stats.commitBatchingEmptyMessageRatio.addMeasurement(ratio);
if (!self->forceRecovery) {
ASSERT(pProxyCommitData->latestLocalCommitBatchLogging.get() == self->localBatchNumber - 1);
pProxyCommitData->latestLocalCommitBatchLogging.set(self->localBatchNumber);
}
self->computeDuration += g_network->timer() - self->computeStart;
if (self->batchOperations > 0) {
double computePerOperation =
std::min(SERVER_KNOBS->MAX_COMPUTE_PER_OPERATION, self->computeDuration / self->batchOperations);
if (computePerOperation <= pProxyCommitData->commitComputePerOperation[self->latencyBucket]) {
pProxyCommitData->commitComputePerOperation[self->latencyBucket] = computePerOperation;
} else {
pProxyCommitData->commitComputePerOperation[self->latencyBucket] =
SERVER_KNOBS->PROXY_COMPUTE_GROWTH_RATE * computePerOperation +
((1.0 - SERVER_KNOBS->PROXY_COMPUTE_GROWTH_RATE) *
pProxyCommitData->commitComputePerOperation[self->latencyBucket]);
}
pProxyCommitData->stats.maxComputeNS =
std::max<int64_t>(pProxyCommitData->stats.maxComputeNS,
1e9 * pProxyCommitData->commitComputePerOperation[self->latencyBucket]);
pProxyCommitData->stats.minComputeNS =
std::min<int64_t>(pProxyCommitData->stats.minComputeNS,
1e9 * pProxyCommitData->commitComputePerOperation[self->latencyBucket]);
}
pProxyCommitData->stats.processingMutationDist->sampleSeconds(now() - postResolutionQueuing);
return Void();
}
ACTOR Future<Void> transactionLogging(CommitBatchContext* self) {
state double tLoggingStart = now();
state ProxyCommitData* const pProxyCommitData = self->pProxyCommitData;
state Span span("MP:transactionLogging"_loc, self->span.context);
try {
choose {
when(Version ver = wait(self->loggingComplete)) {
pProxyCommitData->minKnownCommittedVersion = std::max(pProxyCommitData->minKnownCommittedVersion, ver);
}
when(wait(pProxyCommitData->committedVersion.whenAtLeast(self->commitVersion + 1))) {}
}
} catch (Error& e) {
if (e.code() == error_code_broken_promise) {
throw tlog_failed();
}
throw;
}
pProxyCommitData->lastCommitLatency = now() - self->commitStartTime;
pProxyCommitData->lastCommitTime = std::max(pProxyCommitData->lastCommitTime.get(), self->commitStartTime);
wait(yield(TaskPriority::ProxyCommitYield2));
if (pProxyCommitData->popRemoteTxs &&
self->msg.popTo > (pProxyCommitData->txsPopVersions.size() ? pProxyCommitData->txsPopVersions.back().second
: pProxyCommitData->lastTxsPop)) {
if (pProxyCommitData->txsPopVersions.size() >= SERVER_KNOBS->MAX_TXS_POP_VERSION_HISTORY) {
TraceEvent(SevWarnAlways, "DiscardingTxsPopHistory").suppressFor(1.0);
pProxyCommitData->txsPopVersions.pop_front();
}
pProxyCommitData->txsPopVersions.emplace_back(self->commitVersion, self->msg.popTo);
}
pProxyCommitData->logSystem->popTxs(self->msg.popTo);
pProxyCommitData->stats.tlogLoggingDist->sampleSeconds(now() - tLoggingStart);
return Void();
}
ACTOR Future<Void> reply(CommitBatchContext* self) {
state double replyStart = now();
state ProxyCommitData* const pProxyCommitData = self->pProxyCommitData;
state Span span("MP:reply"_loc, self->span.context);
const Optional<UID>& debugID = self->debugID;
if (self->prevVersion && self->commitVersion - self->prevVersion < SERVER_KNOBS->MAX_VERSIONS_IN_FLIGHT / 2) {
//TraceEvent("CPAdvanceMinVersion", self->pProxyCommitData->dbgid).detail("PrvVersion", self->prevVersion).detail("CommitVersion", self->commitVersion).detail("Master", self->pProxyCommitData->master.id().toString()).detail("TxSize", self->trs.size());
debug_advanceMinCommittedVersion(UID(), self->commitVersion);
}
//TraceEvent("ProxyPushed", pProxyCommitData->dbgid).detail("PrevVersion", prevVersion).detail("Version", commitVersion);
if (debugID.present())
g_traceBatch.addEvent("CommitDebug", debugID.get().first(), "CommitProxyServer.commitBatch.AfterLogPush");
for (auto& p : self->storeCommits) {
ASSERT(!p.second.isReady());
p.first.get().acknowledge.send(Void());
ASSERT(p.second.isReady());
}
// After logging finishes, we report the commit version to master so that every other proxy can get the most
// up-to-date live committed version. We also maintain the invariant that master's committed version >=
// self->committedVersion by reporting commit version first before updating self->committedVersion. Otherwise, a
// client may get a commit version that the master is not aware of, and next GRV request may get a version less than
// self->committedVersion.
TEST(pProxyCommitData->committedVersion.get() > self->commitVersion); // later version was reported committed first
if (self->commitVersion >= pProxyCommitData->committedVersion.get()) {
wait(pProxyCommitData->master.reportLiveCommittedVersion.getReply(
ReportRawCommittedVersionRequest(self->commitVersion,
self->lockedAfter,
self->metadataVersionAfter,
pProxyCommitData->minKnownCommittedVersion),
TaskPriority::ProxyMasterVersionReply));
}
if (self->commitVersion > pProxyCommitData->committedVersion.get()) {
pProxyCommitData->locked = self->lockedAfter;
pProxyCommitData->metadataVersion = self->metadataVersionAfter;
pProxyCommitData->committedVersion.set(self->commitVersion);
}
if (self->forceRecovery) {
TraceEvent(SevWarn, "RestartingTxnSubsystem", pProxyCommitData->dbgid).detail("Stage", "ProxyShutdown");
throw worker_removed();
}
// Send replies to clients
double endTime = g_network->timer();
// Reset all to zero, used to track the correct index of each commitTransacitonRef on each resolver
std::fill(self->nextTr.begin(), self->nextTr.end(), 0);
for (int t = 0; t < self->trs.size(); t++) {
auto& tr = self->trs[t];
if (self->committed[t] == ConflictBatch::TransactionCommitted && (!self->locked || tr.isLockAware())) {
ASSERT_WE_THINK(self->commitVersion != invalidVersion);
tr.reply.send(CommitID(self->commitVersion, t, self->metadataVersionAfter));
} else if (self->committed[t] == ConflictBatch::TransactionTooOld) {
tr.reply.sendError(transaction_too_old());
} else {
// If enable the option to report conflicting keys from resolvers, we send back all keyranges' indices
// through CommitID
if (tr.transaction.report_conflicting_keys) {
Standalone<VectorRef<int>> conflictingKRIndices;
for (int resolverInd : self->transactionResolverMap[t]) {
auto const& cKRs =
self->resolution[resolverInd]
.conflictingKeyRangeMap[self->nextTr[resolverInd]]; // nextTr[resolverInd] -> index of this
// trs[t] on the resolver
for (auto const& rCRIndex : cKRs)
// read_conflict_range can change when sent to resolvers, mapping the index from resolver-side
// to original index in commitTransactionRef
conflictingKRIndices.push_back(conflictingKRIndices.arena(),
self->txReadConflictRangeIndexMap[t][resolverInd][rCRIndex]);
}
// At least one keyRange index should be returned
ASSERT(conflictingKRIndices.size());
tr.reply.send(CommitID(
invalidVersion, t, Optional<Value>(), Optional<Standalone<VectorRef<int>>>(conflictingKRIndices)));
} else {
tr.reply.sendError(not_committed());
}
}
// Update corresponding transaction indices on each resolver
for (int resolverInd : self->transactionResolverMap[t])
self->nextTr[resolverInd]++;
// TODO: filter if pipelined with large commit
const double duration = endTime - tr.requestTime();
pProxyCommitData->stats.commitLatencySample.addMeasurement(duration);
if (pProxyCommitData->latencyBandConfig.present()) {
bool filter = self->maxTransactionBytes >
pProxyCommitData->latencyBandConfig.get().commitConfig.maxCommitBytes.orDefault(
std::numeric_limits<int>::max());
pProxyCommitData->stats.commitLatencyBands.addMeasurement(duration, filter);
}
}
++pProxyCommitData->stats.commitBatchOut;
pProxyCommitData->stats.txnCommitOut += self->trs.size();
pProxyCommitData->stats.txnConflicts += self->trs.size() - self->commitCount;
pProxyCommitData->stats.txnCommitOutSuccess += self->commitCount;
if (now() - pProxyCommitData->lastCoalesceTime > SERVER_KNOBS->RESOLVER_COALESCE_TIME) {
pProxyCommitData->lastCoalesceTime = now();
int lastSize = pProxyCommitData->keyResolvers.size();
auto rs = pProxyCommitData->keyResolvers.ranges();
Version oldestVersion = self->prevVersion - SERVER_KNOBS->MAX_WRITE_TRANSACTION_LIFE_VERSIONS;
for (auto r = rs.begin(); r != rs.end(); ++r) {
while (r->value().size() > 1 && r->value()[1].first < oldestVersion)
r->value().pop_front();
if (r->value().size() && r->value().front().first < oldestVersion)
r->value().front().first = 0;
}
pProxyCommitData->keyResolvers.coalesce(allKeys);
if (pProxyCommitData->keyResolvers.size() != lastSize)
TraceEvent("KeyResolverSize", pProxyCommitData->dbgid)
.detail("Size", pProxyCommitData->keyResolvers.size());
}
// Dynamic batching for commits
double target_latency =
(now() - self->startTime) * SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_INTERVAL_LATENCY_FRACTION;
pProxyCommitData->commitBatchInterval =
std::max(SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_INTERVAL_MIN,
std::min(SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_INTERVAL_MAX,
target_latency * SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_INTERVAL_SMOOTHER_ALPHA +
pProxyCommitData->commitBatchInterval *
(1 - SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_INTERVAL_SMOOTHER_ALPHA)));
pProxyCommitData->stats.commitBatchingWindowSize.addMeasurement(pProxyCommitData->commitBatchInterval);
pProxyCommitData->commitBatchesMemBytesCount -= self->currentBatchMemBytesCount;
ASSERT_ABORT(pProxyCommitData->commitBatchesMemBytesCount >= 0);
wait(self->releaseFuture);
pProxyCommitData->stats.replyCommitDist->sampleSeconds(now() - replyStart);
return Void();
}
} // namespace CommitBatch
// Commit one batch of transactions trs
ACTOR Future<Void> commitBatch(ProxyCommitData* self,
std::vector<CommitTransactionRequest>* trs,
int currentBatchMemBytesCount) {
// WARNING: this code is run at a high priority (until the first delay(0)), so it needs to do as little work as
// possible
state CommitBatch::CommitBatchContext context(self, trs, currentBatchMemBytesCount);
getCurrentLineage()->modify(&TransactionLineage::operation) = TransactionLineage::Operation::Commit;
// Active load balancing runs at a very high priority (to obtain accurate estimate of memory used by commit batches)
// so we need to downgrade here
wait(delay(0, TaskPriority::ProxyCommit));
context.pProxyCommitData->lastVersionTime = context.startTime;
++context.pProxyCommitData->stats.commitBatchIn;
context.setupTraceBatch();
/////// Phase 1: Pre-resolution processing (CPU bound except waiting for a version # which is separately pipelined
/// and *should* be available by now (unless empty commit); ordered; currently atomic but could yield)
wait(CommitBatch::preresolutionProcessing(&context));
if (context.rejected) {
self->commitBatchesMemBytesCount -= currentBatchMemBytesCount;
return Void();
}
/////// Phase 2: Resolution (waiting on the network; pipelined)
wait(CommitBatch::getResolution(&context));
////// Phase 3: Post-resolution processing (CPU bound except for very rare situations; ordered; currently atomic but
/// doesn't need to be)
wait(CommitBatch::postResolution(&context));
/////// Phase 4: Logging (network bound; pipelined up to MAX_READ_TRANSACTION_LIFE_VERSIONS (limited by loop above))
wait(CommitBatch::transactionLogging(&context));
/////// Phase 5: Replies (CPU bound; no particular order required, though ordered execution would be best for
/// latency)
wait(CommitBatch::reply(&context));
return Void();
}
// Add tss mapping data to the reply, if any of the included storage servers have a TSS pair
void maybeAddTssMapping(GetKeyServerLocationsReply& reply,
ProxyCommitData* commitData,
std::unordered_set<UID>& included,
UID ssId) {
if (!included.count(ssId)) {
auto mappingItr = commitData->tssMapping.find(ssId);
if (mappingItr != commitData->tssMapping.end()) {
reply.resultsTssMapping.push_back(*mappingItr);
}
included.insert(ssId);
}
}
ACTOR static Future<Void> doKeyServerLocationRequest(GetKeyServerLocationsRequest req, ProxyCommitData* commitData) {
// We can't respond to these requests until we have valid txnStateStore
getCurrentLineage()->modify(&TransactionLineage::operation) = TransactionLineage::Operation::GetKeyServersLocations;
getCurrentLineage()->modify(&TransactionLineage::txID) = req.spanContext.first();
wait(commitData->validState.getFuture());
wait(delay(0, TaskPriority::DefaultEndpoint));
std::unordered_set<UID> tssMappingsIncluded;
GetKeyServerLocationsReply rep;
if (!req.end.present()) {
auto r = req.reverse ? commitData->keyInfo.rangeContainingKeyBefore(req.begin)
: commitData->keyInfo.rangeContaining(req.begin);
std::vector<StorageServerInterface> ssis;
ssis.reserve(r.value().src_info.size());
for (auto& it : r.value().src_info) {
ssis.push_back(it->interf);
maybeAddTssMapping(rep, commitData, tssMappingsIncluded, it->interf.id());
}
rep.results.emplace_back(r.range(), ssis);
} else if (!req.reverse) {
int count = 0;
for (auto r = commitData->keyInfo.rangeContaining(req.begin);
r != commitData->keyInfo.ranges().end() && count < req.limit && r.begin() < req.end.get();
++r) {
std::vector<StorageServerInterface> ssis;
ssis.reserve(r.value().src_info.size());
for (auto& it : r.value().src_info) {
ssis.push_back(it->interf);
maybeAddTssMapping(rep, commitData, tssMappingsIncluded, it->interf.id());
}
rep.results.emplace_back(r.range(), ssis);
count++;
}
} else {
int count = 0;
auto r = commitData->keyInfo.rangeContainingKeyBefore(req.end.get());
while (count < req.limit && req.begin < r.end()) {
std::vector<StorageServerInterface> ssis;
ssis.reserve(r.value().src_info.size());
for (auto& it : r.value().src_info) {
ssis.push_back(it->interf);
maybeAddTssMapping(rep, commitData, tssMappingsIncluded, it->interf.id());
}
rep.results.emplace_back(r.range(), ssis);
if (r == commitData->keyInfo.ranges().begin()) {
break;
}
count++;
--r;
}
}
req.reply.send(rep);
++commitData->stats.keyServerLocationOut;
return Void();
}
ACTOR static Future<Void> readRequestServer(CommitProxyInterface proxy,
PromiseStream<Future<Void>> addActor,
ProxyCommitData* commitData) {
loop {
GetKeyServerLocationsRequest req = waitNext(proxy.getKeyServersLocations.getFuture());
// WARNING: this code is run at a high priority, so it needs to do as little work as possible
if (req.limit != CLIENT_KNOBS->STORAGE_METRICS_SHARD_LIMIT && // Always do data distribution requests
commitData->stats.keyServerLocationIn.getValue() - commitData->stats.keyServerLocationOut.getValue() >
SERVER_KNOBS->KEY_LOCATION_MAX_QUEUE_SIZE) {
++commitData->stats.keyServerLocationErrors;
req.reply.sendError(proxy_memory_limit_exceeded());
TraceEvent(SevWarnAlways, "ProxyLocationRequestThresholdExceeded").suppressFor(60);
} else {
++commitData->stats.keyServerLocationIn;
addActor.send(doKeyServerLocationRequest(req, commitData));
}
}
}
ACTOR static Future<Void> rejoinServer(CommitProxyInterface proxy, ProxyCommitData* commitData) {
// We can't respond to these requests until we have valid txnStateStore
wait(commitData->validState.getFuture());
TraceEvent("ProxyReadyForReads", proxy.id()).log();
loop {
GetStorageServerRejoinInfoRequest req = waitNext(proxy.getStorageServerRejoinInfo.getFuture());
if (commitData->txnStateStore->readValue(serverListKeyFor(req.id)).get().present()) {
GetStorageServerRejoinInfoReply rep;
rep.version = commitData->version;
rep.tag = decodeServerTagValue(commitData->txnStateStore->readValue(serverTagKeyFor(req.id)).get().get());
RangeResult history = commitData->txnStateStore->readRange(serverTagHistoryRangeFor(req.id)).get();
for (int i = history.size() - 1; i >= 0; i--) {
rep.history.push_back(
std::make_pair(decodeServerTagHistoryKey(history[i].key), decodeServerTagValue(history[i].value)));
}
auto localityKey = commitData->txnStateStore->readValue(tagLocalityListKeyFor(req.dcId)).get();
rep.newLocality = false;
if (localityKey.present()) {
int8_t locality = decodeTagLocalityListValue(localityKey.get());
if (rep.tag.locality != tagLocalityUpgraded && locality != rep.tag.locality) {
TraceEvent(SevWarnAlways, "SSRejoinedWithChangedLocality")
.detail("Tag", rep.tag.toString())
.detail("DcId", req.dcId)
.detail("NewLocality", locality);
} else if (locality != rep.tag.locality) {
uint16_t tagId = 0;
std::vector<uint16_t> usedTags;
auto tagKeys = commitData->txnStateStore->readRange(serverTagKeys).get();
for (auto& kv : tagKeys) {
Tag t = decodeServerTagValue(kv.value);
if (t.locality == locality) {
usedTags.push_back(t.id);
}
}
auto historyKeys = commitData->txnStateStore->readRange(serverTagHistoryKeys).get();
for (auto& kv : historyKeys) {
Tag t = decodeServerTagValue(kv.value);
if (t.locality == locality) {
usedTags.push_back(t.id);
}
}
std::sort(usedTags.begin(), usedTags.end());
int usedIdx = 0;
for (; usedTags.size() > 0 && tagId <= usedTags.end()[-1]; tagId++) {
if (tagId < usedTags[usedIdx]) {
break;
} else {
usedIdx++;
}
}
rep.newTag = Tag(locality, tagId);
}
} else if (rep.tag.locality != tagLocalityUpgraded) {
TraceEvent(SevWarnAlways, "SSRejoinedWithUnknownLocality")
.detail("Tag", rep.tag.toString())
.detail("DcId", req.dcId);
} else {
rep.newLocality = true;
int8_t maxTagLocality = -1;
auto localityKeys = commitData->txnStateStore->readRange(tagLocalityListKeys).get();
for (auto& kv : localityKeys) {
maxTagLocality = std::max(maxTagLocality, decodeTagLocalityListValue(kv.value));
}
rep.newTag = Tag(maxTagLocality + 1, 0);
}
req.reply.send(rep);
} else {
req.reply.sendError(worker_removed());
}
}
}
ACTOR Future<Void> ddMetricsRequestServer(CommitProxyInterface proxy, Reference<AsyncVar<ServerDBInfo> const> db) {
loop {
choose {
when(state GetDDMetricsRequest req = waitNext(proxy.getDDMetrics.getFuture())) {
if (!db->get().distributor.present()) {
req.reply.sendError(dd_not_found());
continue;
}
ErrorOr<GetDataDistributorMetricsReply> reply =
wait(errorOr(db->get().distributor.get().dataDistributorMetrics.getReply(
GetDataDistributorMetricsRequest(req.keys, req.shardLimit))));
if (reply.isError()) {
req.reply.sendError(reply.getError());
} else {
GetDDMetricsReply newReply;
newReply.storageMetricsList = reply.get().storageMetricsList;
req.reply.send(newReply);
}
}
}
}
}
ACTOR Future<Void> monitorRemoteCommitted(ProxyCommitData* self) {
loop {
wait(delay(0)); // allow this actor to be cancelled if we are removed after db changes.
state Optional<std::vector<OptionalInterface<TLogInterface>>> remoteLogs;
if (self->db->get().recoveryState >= RecoveryState::ALL_LOGS_RECRUITED) {
for (auto& logSet : self->db->get().logSystemConfig.tLogs) {
if (!logSet.isLocal) {
remoteLogs = logSet.tLogs;
for (auto& tLog : logSet.tLogs) {
if (!tLog.present()) {
remoteLogs = Optional<std::vector<OptionalInterface<TLogInterface>>>();
break;
}
}
break;
}
}
}
if (!remoteLogs.present()) {
wait(self->db->onChange());
continue;
}
self->popRemoteTxs = true;
state Future<Void> onChange = self->db->onChange();
loop {
state std::vector<Future<TLogQueuingMetricsReply>> replies;
for (auto& it : remoteLogs.get()) {
replies.push_back(
brokenPromiseToNever(it.interf().getQueuingMetrics.getReply(TLogQueuingMetricsRequest())));
}
wait(waitForAll(replies) || onChange);
if (onChange.isReady()) {
break;
}
// FIXME: use the configuration to calculate a more precise minimum recovery version.
Version minVersion = std::numeric_limits<Version>::max();
for (auto& it : replies) {
minVersion = std::min(minVersion, it.get().v);
}
while (self->txsPopVersions.size() && self->txsPopVersions.front().first <= minVersion) {
self->lastTxsPop = self->txsPopVersions.front().second;
self->logSystem->popTxs(self->txsPopVersions.front().second, tagLocalityRemoteLog);
self->txsPopVersions.pop_front();
}
wait(delay(SERVER_KNOBS->UPDATE_REMOTE_LOG_VERSION_INTERVAL) || onChange);
if (onChange.isReady()) {
break;
}
}
}
}
ACTOR Future<Void> proxySnapCreate(ProxySnapRequest snapReq, ProxyCommitData* commitData) {
TraceEvent("SnapCommitProxy_SnapReqEnter")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);
try {
// whitelist check
ExecCmdValueString execArg(snapReq.snapPayload);
StringRef binPath = execArg.getBinaryPath();
if (!isWhitelisted(commitData->whitelistedBinPathVec, binPath)) {
TraceEvent("SnapCommitProxy_WhiteListCheckFailed")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);
throw snap_path_not_whitelisted();
}
// db fully recovered check
if (commitData->db->get().recoveryState != RecoveryState::FULLY_RECOVERED) {
// Cluster is not fully recovered and needs TLogs
// from previous generation for full recovery.
// Currently, snapshot of old tlog generation is not
// supported and hence failing the snapshot request until
// cluster is fully_recovered.
TraceEvent("SnapCommitProxy_ClusterNotFullyRecovered")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);
throw snap_not_fully_recovered_unsupported();
}
auto result =
commitData->txnStateStore->readValue(LiteralStringRef("log_anti_quorum").withPrefix(configKeysPrefix))
.get();
int logAntiQuorum = 0;
if (result.present()) {
logAntiQuorum = atoi(result.get().toString().c_str());
}
// FIXME: logAntiQuorum not supported, remove it later,
// In version2, we probably don't need this limtiation, but this needs to be tested.
if (logAntiQuorum > 0) {
TraceEvent("SnapCommitProxy_LogAntiQuorumNotSupported")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);
throw snap_log_anti_quorum_unsupported();
}
// send a snap request to DD
if (!commitData->db->get().distributor.present()) {
TraceEvent(SevWarnAlways, "DataDistributorNotPresent").detail("Operation", "SnapRequest");
throw dd_not_found();
}
state Future<ErrorOr<Void>> ddSnapReq = commitData->db->get().distributor.get().distributorSnapReq.tryGetReply(
DistributorSnapRequest(snapReq.snapPayload, snapReq.snapUID));
try {
wait(throwErrorOr(ddSnapReq));
} catch (Error& e) {
TraceEvent("SnapCommitProxy_DDSnapResponseError")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID)
.error(e, true /*includeCancelled*/);
throw e;
}
snapReq.reply.send(Void());
} catch (Error& e) {
TraceEvent("SnapCommitProxy_SnapReqError")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID)
.error(e, true /*includeCancelled*/);
if (e.code() != error_code_operation_cancelled) {
snapReq.reply.sendError(e);
} else {
throw e;
}
}
TraceEvent("SnapCommitProxy_SnapReqExit")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);
return Void();
}
ACTOR Future<Void> proxyCheckSafeExclusion(Reference<AsyncVar<ServerDBInfo> const> db,
ExclusionSafetyCheckRequest req) {
TraceEvent("SafetyCheckCommitProxyBegin").log();
state ExclusionSafetyCheckReply reply(false);
if (!db->get().distributor.present()) {
TraceEvent(SevWarnAlways, "DataDistributorNotPresent").detail("Operation", "ExclusionSafetyCheck");
req.reply.send(reply);
return Void();
}
try {
state Future<ErrorOr<DistributorExclusionSafetyCheckReply>> safeFuture =
db->get().distributor.get().distributorExclCheckReq.tryGetReply(
DistributorExclusionSafetyCheckRequest(req.exclusions));
DistributorExclusionSafetyCheckReply _reply = wait(throwErrorOr(safeFuture));
reply.safe = _reply.safe;
} catch (Error& e) {
TraceEvent("SafetyCheckCommitProxyResponseError").error(e);
if (e.code() != error_code_operation_cancelled) {
req.reply.sendError(e);
return Void();
} else {
throw e;
}
}
TraceEvent("SafetyCheckCommitProxyFinish").log();
req.reply.send(reply);
return Void();
}
ACTOR Future<Void> reportTxnTagCommitCost(UID myID,
Reference<AsyncVar<ServerDBInfo> const> db,
UIDTransactionTagMap<TransactionCommitCostEstimation>* ssTrTagCommitCost) {
state Future<Void> nextRequestTimer = Never();
state Future<Void> nextReply = Never();
if (db->get().ratekeeper.present())
nextRequestTimer = Void();
loop choose {
when(wait(db->onChange())) {
if (db->get().ratekeeper.present()) {
TraceEvent("ProxyRatekeeperChanged", myID).detail("RKID", db->get().ratekeeper.get().id());
nextRequestTimer = Void();
} else {
TraceEvent("ProxyRatekeeperDied", myID).log();
nextRequestTimer = Never();
}
}
when(wait(nextRequestTimer)) {
nextRequestTimer = Never();
if (db->get().ratekeeper.present()) {
nextReply = brokenPromiseToNever(db->get().ratekeeper.get().reportCommitCostEstimation.getReply(
ReportCommitCostEstimationRequest(*ssTrTagCommitCost)));
} else {
nextReply = Never();
}
}
when(wait(nextReply)) {
nextReply = Never();
ssTrTagCommitCost->clear();
nextRequestTimer = delay(SERVER_KNOBS->REPORT_TRANSACTION_COST_ESTIMATION_DELAY);
}
}
}
namespace {
struct TransactionStateResolveContext {
// Maximum sequence for txnStateRequest, this is defined when the request last flag is set.
Sequence maxSequence = std::numeric_limits<Sequence>::max();
// Flags marks received transaction state requests, we only process the transaction request when *all* requests are
// received.
std::unordered_set<Sequence> receivedSequences;
ProxyCommitData* pCommitData = nullptr;
// Pointer to transaction state store, shortcut for commitData.txnStateStore
IKeyValueStore* pTxnStateStore = nullptr;
// Actor streams
PromiseStream<Future<Void>>* pActors = nullptr;
// Flag reports if the transaction state request is complete. This request should only happen during recover, i.e.
// once per commit proxy.
bool processed = false;
TransactionStateResolveContext() = default;
TransactionStateResolveContext(ProxyCommitData* pCommitData_, PromiseStream<Future<Void>>* pActors_)
: pCommitData(pCommitData_), pTxnStateStore(pCommitData_->txnStateStore), pActors(pActors_) {
ASSERT(pTxnStateStore != nullptr);
}
};
ACTOR Future<Void> processCompleteTransactionStateRequest(TransactionStateResolveContext* pContext) {
state KeyRange txnKeys = allKeys;
state std::map<Tag, UID> tag_uid;
RangeResult UIDtoTagMap = pContext->pTxnStateStore->readRange(serverTagKeys).get();
for (const KeyValueRef& kv : UIDtoTagMap) {
tag_uid[decodeServerTagValue(kv.value)] = decodeServerTagKey(kv.key);
}
loop {
wait(yield());
RangeResult data =
pContext->pTxnStateStore
->readRange(txnKeys, SERVER_KNOBS->BUGGIFIED_ROW_LIMIT, SERVER_KNOBS->APPLY_MUTATION_BYTES)
.get();
if (!data.size())
break;
((KeyRangeRef&)txnKeys) = KeyRangeRef(keyAfter(data.back().key, txnKeys.arena()), txnKeys.end);
MutationsVec mutations;
std::vector<std::pair<MapPair<Key, ServerCacheInfo>, int>> keyInfoData;
std::vector<UID> src, dest;
ServerCacheInfo info;
// NOTE: An ACTOR will be compiled into several classes, the this pointer is from one of them.
auto updateTagInfo = [this](const std::vector<UID>& uids,
std::vector<Tag>& tags,
std::vector<Reference<StorageInfo>>& storageInfoItems) {
for (const auto& id : uids) {
auto storageInfo = getStorageInfo(id, &pContext->pCommitData->storageCache, pContext->pTxnStateStore);
ASSERT(storageInfo->tag != invalidTag);
tags.push_back(storageInfo->tag);
storageInfoItems.push_back(storageInfo);
}
};
for (auto& kv : data) {
if (!kv.key.startsWith(keyServersPrefix)) {
mutations.emplace_back(mutations.arena(), MutationRef::SetValue, kv.key, kv.value);
continue;
}
KeyRef k = kv.key.removePrefix(keyServersPrefix);
if (k == allKeys.end) {
continue;
}
decodeKeyServersValue(tag_uid, kv.value, src, dest);
info.tags.clear();
info.src_info.clear();
updateTagInfo(src, info.tags, info.src_info);
info.dest_info.clear();
updateTagInfo(dest, info.tags, info.dest_info);
uniquify(info.tags);
keyInfoData.emplace_back(MapPair<Key, ServerCacheInfo>(k, info), 1);
}
// insert keyTag data separately from metadata mutations so that we can do one bulk insert which
// avoids a lot of map lookups.
pContext->pCommitData->keyInfo.rawInsert(keyInfoData);
Arena arena;
bool confChanges;
applyMetadataMutations(SpanID(),
*pContext->pCommitData,
arena,
Reference<ILogSystem>(),
mutations,
/* pToCommit= */ nullptr,
confChanges,
/* popVersion= */ 0,
/* initialCommit= */ true);
} // loop
auto lockedKey = pContext->pTxnStateStore->readValue(databaseLockedKey).get();
pContext->pCommitData->locked = lockedKey.present() && lockedKey.get().size();
pContext->pCommitData->metadataVersion = pContext->pTxnStateStore->readValue(metadataVersionKey).get();
pContext->pTxnStateStore->enableSnapshot();
return Void();
}
ACTOR Future<Void> processTransactionStateRequestPart(TransactionStateResolveContext* pContext,
TxnStateRequest request) {
state const TxnStateRequest& req = request;
state ProxyCommitData& commitData = *pContext->pCommitData;
state PromiseStream<Future<Void>>& addActor = *pContext->pActors;
state Sequence& maxSequence = pContext->maxSequence;
state ReplyPromise<Void> reply = req.reply;
state std::unordered_set<Sequence>& txnSequences = pContext->receivedSequences;
ASSERT(pContext->pCommitData != nullptr);
ASSERT(pContext->pActors != nullptr);
if (pContext->receivedSequences.count(request.sequence)) {
// This part is already received. Still we will re-broadcast it to other CommitProxies
pContext->pActors->send(broadcastTxnRequest(request, SERVER_KNOBS->TXN_STATE_SEND_AMOUNT, true));
wait(yield());
return Void();
}
if (request.last) {
// This is the last piece of subsequence, yet other pieces might still on the way.
pContext->maxSequence = request.sequence + 1;
}
pContext->receivedSequences.insert(request.sequence);
// Although we may receive the CommitTransactionRequest for the recovery transaction before all of the
// TxnStateRequest, we will not get a resolution result from any resolver until the master has submitted its initial
// (sequence 0) resolution request, which it doesn't do until we have acknowledged all TxnStateRequests
ASSERT(!pContext->pCommitData->validState.isSet());
for (auto& kv : request.data) {
pContext->pTxnStateStore->set(kv, &request.arena);
}
pContext->pTxnStateStore->commit(true);
if (pContext->receivedSequences.size() == pContext->maxSequence) {
// Received all components of the txnStateRequest
ASSERT(!pContext->processed);
wait(processCompleteTransactionStateRequest(pContext));
pContext->processed = true;
}
pContext->pActors->send(broadcastTxnRequest(request, SERVER_KNOBS->TXN_STATE_SEND_AMOUNT, true));
wait(yield());
return Void();
}
} // anonymous namespace
ACTOR Future<Void> commitProxyServerCore(CommitProxyInterface proxy,
MasterInterface master,
LifetimeToken masterLifetime,
Reference<AsyncVar<ServerDBInfo> const> db,
LogEpoch epoch,
Version recoveryTransactionVersion,
bool firstProxy,
std::string whitelistBinPaths) {
state ProxyCommitData commitData(
proxy.id(), master, proxy.getConsistentReadVersion, recoveryTransactionVersion, proxy.commit, db, firstProxy);
state Future<Sequence> sequenceFuture = (Sequence)0;
state PromiseStream<std::pair<std::vector<CommitTransactionRequest>, int>> batchedCommits;
state Future<Void> commitBatcherActor;
state Future<Void> lastCommitComplete = Void();
state PromiseStream<Future<Void>> addActor;
state Future<Void> onError = transformError(actorCollection(addActor.getFuture()), broken_promise(), tlog_failed());
state double lastCommit = 0;
state GetHealthMetricsReply healthMetricsReply;
state GetHealthMetricsReply detailedHealthMetricsReply;
addActor.send(waitFailureServer(proxy.waitFailure.getFuture()));
addActor.send(traceRole(Role::COMMIT_PROXY, proxy.id()));
//TraceEvent("CommitProxyInit1", proxy.id());
// Wait until we can load the "real" logsystem, since we don't support switching them currently
while (!(masterLifetime.isEqual(commitData.db->get().masterLifetime) &&
commitData.db->get().recoveryState >= RecoveryState::RECOVERY_TRANSACTION)) {
//TraceEvent("ProxyInit2", proxy.id()).detail("LSEpoch", db->get().logSystemConfig.epoch).detail("Need", epoch);
wait(commitData.db->onChange());
}
state Future<Void> dbInfoChange = commitData.db->onChange();
//TraceEvent("ProxyInit3", proxy.id());
commitData.resolvers = commitData.db->get().resolvers;
ASSERT(commitData.resolvers.size() != 0);
for (int i = 0; i < commitData.resolvers.size(); ++i) {
commitData.stats.resolverDist.push_back(
Histogram::getHistogram(LiteralStringRef("CommitProxy"),
"ToResolver_" + commitData.resolvers[i].id().toString(),
Histogram::Unit::microseconds));
}
auto rs = commitData.keyResolvers.modify(allKeys);
for (auto r = rs.begin(); r != rs.end(); ++r)
r->value().emplace_back(0, 0);
commitData.logSystem = ILogSystem::fromServerDBInfo(proxy.id(), commitData.db->get(), false, addActor);
commitData.logAdapter =
new LogSystemDiskQueueAdapter(commitData.logSystem, Reference<AsyncVar<PeekTxsInfo>>(), 1, false);
commitData.txnStateStore = keyValueStoreLogSystem(commitData.logAdapter, proxy.id(), 2e9, true, true, true);
createWhitelistBinPathVec(whitelistBinPaths, commitData.whitelistedBinPathVec);
commitData.updateLatencyBandConfig(commitData.db->get().latencyBandConfig);
// ((SERVER_MEM_LIMIT * COMMIT_BATCHES_MEM_FRACTION_OF_TOTAL) / COMMIT_BATCHES_MEM_TO_TOTAL_MEM_SCALE_FACTOR) is
// only a approximate formula for limiting the memory used. COMMIT_BATCHES_MEM_TO_TOTAL_MEM_SCALE_FACTOR is an
// estimate based on experiments and not an accurate one.
state int64_t commitBatchesMemoryLimit = std::min(
SERVER_KNOBS->COMMIT_BATCHES_MEM_BYTES_HARD_LIMIT,
static_cast<int64_t>((SERVER_KNOBS->SERVER_MEM_LIMIT * SERVER_KNOBS->COMMIT_BATCHES_MEM_FRACTION_OF_TOTAL) /
SERVER_KNOBS->COMMIT_BATCHES_MEM_TO_TOTAL_MEM_SCALE_FACTOR));
TraceEvent(SevInfo, "CommitBatchesMemoryLimit").detail("BytesLimit", commitBatchesMemoryLimit);
addActor.send(monitorRemoteCommitted(&commitData));
addActor.send(readRequestServer(proxy, addActor, &commitData));
addActor.send(rejoinServer(proxy, &commitData));
addActor.send(ddMetricsRequestServer(proxy, db));
addActor.send(reportTxnTagCommitCost(proxy.id(), db, &commitData.ssTrTagCommitCost));
// wait for txnStateStore recovery
wait(success(commitData.txnStateStore->readValue(StringRef())));
int commitBatchByteLimit =
(int)std::min<double>(SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_BYTES_MAX,
std::max<double>(SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_BYTES_MIN,
SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_BYTES_SCALE_BASE *
pow(commitData.db->get().client.commitProxies.size(),
SERVER_KNOBS->COMMIT_TRANSACTION_BATCH_BYTES_SCALE_POWER)));
commitBatcherActor = commitBatcher(
&commitData, batchedCommits, proxy.commit.getFuture(), commitBatchByteLimit, commitBatchesMemoryLimit);
// This has to be declared after the commitData.txnStateStore get initialized
state TransactionStateResolveContext transactionStateResolveContext(&commitData, &addActor);
loop choose {
when(wait(dbInfoChange)) {
dbInfoChange = commitData.db->onChange();
if (masterLifetime.isEqual(commitData.db->get().masterLifetime) &&
commitData.db->get().recoveryState >= RecoveryState::RECOVERY_TRANSACTION) {
commitData.logSystem = ILogSystem::fromServerDBInfo(proxy.id(), commitData.db->get(), false, addActor);
for (auto it : commitData.tag_popped) {
commitData.logSystem->pop(it.second, it.first);
}
commitData.logSystem->popTxs(commitData.lastTxsPop, tagLocalityRemoteLog);
}
commitData.updateLatencyBandConfig(commitData.db->get().latencyBandConfig);
}
when(wait(onError)) {}
when(std::pair<std::vector<CommitTransactionRequest>, int> batchedRequests =
waitNext(batchedCommits.getFuture())) {
// WARNING: this code is run at a high priority, so it needs to do as little work as possible
const std::vector<CommitTransactionRequest>& trs = batchedRequests.first;
int batchBytes = batchedRequests.second;
//TraceEvent("CommitProxyCTR", proxy.id()).detail("CommitTransactions", trs.size()).detail("TransactionRate", transactionRate).detail("TransactionQueue", transactionQueue.size()).detail("ReleasedTransactionCount", transactionCount);
//TraceEvent("CommitProxyCore", commitData.dbgid).detail("TxSize", trs.size()).detail("MasterLifetime", masterLifetime.toString()).detail("DbMasterLifetime", commitData.db->get().masterLifetime.toString()).detail("RecoveryState", commitData.db->get().recoveryState).detail("CCInf", commitData.db->get().clusterInterface.id().toString());
if (trs.size() || (commitData.db->get().recoveryState >= RecoveryState::ACCEPTING_COMMITS &&
masterLifetime.isEqual(commitData.db->get().masterLifetime) &&
now() - lastCommit >= SERVER_KNOBS->MAX_COMMIT_BATCH_INTERVAL)) {
lastCommit = now();
if (trs.size() || lastCommitComplete.isReady()) {
lastCommitComplete = transformError(
timeoutError(
commitBatch(&commitData,
const_cast<std::vector<CommitTransactionRequest>*>(&batchedRequests.first),
batchBytes),
SERVER_KNOBS->COMMIT_PROXY_LIVENESS_TIMEOUT),
timed_out(),
failed_to_progress());
addActor.send(lastCommitComplete);
}
}
}
when(ProxySnapRequest snapReq = waitNext(proxy.proxySnapReq.getFuture())) {
TraceEvent(SevDebug, "SnapMasterEnqueue").log();
addActor.send(proxySnapCreate(snapReq, &commitData));
}
when(ExclusionSafetyCheckRequest exclCheckReq = waitNext(proxy.exclusionSafetyCheckReq.getFuture())) {
addActor.send(proxyCheckSafeExclusion(db, exclCheckReq));
}
when(TxnStateRequest request = waitNext(proxy.txnState.getFuture())) {
addActor.send(processTransactionStateRequestPart(&transactionStateResolveContext, request));
}
}
}
ACTOR Future<Void> checkRemoved(Reference<AsyncVar<ServerDBInfo> const> db,
uint64_t recoveryCount,
CommitProxyInterface myInterface) {
loop {
if (db->get().recoveryCount >= recoveryCount &&
!std::count(db->get().client.commitProxies.begin(), db->get().client.commitProxies.end(), myInterface)) {
throw worker_removed();
}
wait(db->onChange());
}
}
ACTOR Future<Void> commitProxyServer(CommitProxyInterface proxy,
InitializeCommitProxyRequest req,
Reference<AsyncVar<ServerDBInfo> const> db,
std::string whitelistBinPaths) {
try {
state Future<Void> core = commitProxyServerCore(proxy,
req.master,
req.masterLifetime,
db,
req.recoveryCount,
req.recoveryTransactionVersion,
req.firstProxy,
whitelistBinPaths);
wait(core || checkRemoved(db, req.recoveryCount, proxy));
} catch (Error& e) {
TraceEvent("CommitProxyTerminated", proxy.id()).error(e, true);
if (e.code() != error_code_worker_removed && e.code() != error_code_tlog_stopped &&
e.code() != error_code_tlog_failed && e.code() != error_code_coordinators_changed &&
e.code() != error_code_coordinated_state_conflict && e.code() != error_code_new_coordinators_timed_out &&
e.code() != error_code_failed_to_progress) {
throw;
}
TEST(e.code() == error_code_failed_to_progress); // Commit proxy failed to progress
}
return Void();
}