* proof of concept
* use code-probe instead of test
* code probe working on gcc
* code probe implemented
* renamed TestProbe to CodeProbe
* fixed refactoring typo
* support filtered output
* print probes at end of simulation
* fix missed probes print
* fix deduplication
* Fix refactoring issues
* revert bad refactor
* make sure file paths are relative
* fix more wrong refactor changes
* Log failed connection attempts in monitorProxies
* Update coordinator list from the cluster file after failing to connect to all coordinators
* Wiggle and upgrade test with legacy version monitoring; updating tests to use 7.1.9
* Update coordinator list from the cluster file: addressing review comments
* Update coordinator list from the cluster file: addressing review comments
* Wait on future for all setAndPersistConnectionString calls
* Close trace file when error happens in runNetwork().
* Improve the bestCount algorithm in getLeader().
In the current implementation, if the nominees are [0,1], the chosen leader will be 1, which is an exception to other cases and our expectation that if 2 nominees have the same frequency, the one with lower id will be the leader.
* Remove unnecessary new statement.
stream will never be a nullptr.
* Move self->dnsCache out of lambda capture.
Member variables are not capture by default, thus, `host` and `service` are not captured. This somehow successfully compile, but throws std::bad_alloc or basic_string::_S_create exceptions when we call `host+":"+service` in dnsCache.remove().
* Revert unintended change.
* Address comments.
* coordinatorsKey should not storing IP addresses.
Currently, when we do a commit of coordinator change, we are always converting hostnames to IP addresses and store the converted results in coordinatorsKey (\xff/coordinators). This result in ForwardRequest also sending IP addresses, and receivers will update their cluster files with IPs, then we lose the dynamic IP feature.
* Remove the legacy coordinators() function.
* Update async_resolve().
ip::basic_resolver::async_resolve(const query & q, ResolveHandler && handler) is deprecated.
* Clean code format.
* Fix typo.
* Remove SpecifiedQuorumChange and NoQuorumChange.
* Add tryResolveHostnames() in connection string.
* Add missing hostname to related interfaces.
* Do not pass RequestStream into *GetReplyFromHostname() functions.
Because we are using new RequestStream for each request anyways. Also, the passed in pointer could be nullptr, which results in seg faults.
* Add dynamic hostname resolve and reconnect intervals.
* Address comments.
The ClientDBInfo's comparison is through an internal UID and shrinkProxyList()
can change proxies inside ClientDBInfo. Since the UID is not changed by that
function, subsequent set can be unintentionally skipped.
This was not a big issue before. However, VV introduces a change that the
client side compares the returned proxy ID with its known set of GRV proxies
and will retry GRV if the returned proxy ID is not in the set. Due the above
bug, GRV returned by a proxy is not within the client set, and results in
indefinite retrying GRVs.
* Change DNS cache to use std::map.
Revert commit 90c259d84e95dd35e01149c0a86bd18e82e33930, because if we use unordered_map, toString() can be inconsistent.
* Move ClientKnob::COORDINATOR_HOSTNAME_RESOLVE_DELAY to FlowKnob::HOSTNAME_RESOLVE_DELAY.
* Move Hostname to its own files.
Also, add resolve-related variables and functions in Hostname.
So that when multiple threads try to resolve hostnames concurrently, we should have only one resolving and others wait on the result. Otherwise, they would add duplicated resolved results to coordinators.
Also, combine IClusterConnectionRecord::getConnectionString() and IClusterConnectionRecord::getMutableConnectionString() to IClusterConnectionRecord::getConnectionString(), and rename setConnectionString() to setAndPersistConnectionString().
1. Rename monitorLeaderRemotely* functions to monitorLeaderWithDelayedCandidacy*. "Remote" is not clearly describing what the functions are doing;
2. Rename monitorLeaderForProxies() to monitorLeaderAndGetClientInfo() to better describe the function;
3. Remove monitorLeaderRemotelyInternal() and monitorLeaderRemotely() in MonitorLeader.actor.cpp, to eliminate code duplication. They already exist in worker.actor.cpp;
4. Move the declaration of getLeader() from LeaderElection.actor.cpp to MonitorLeader.h;
5. Update a few comments.
