toKill1 and toKill2 are a random subset of all processes. If simply kill all processes in toKill1 or toKill2,
we may kill too many processes to make the cluster unavailable and stuck.
Similar as what toKill2 were modified if it can cause cluster unavailable,
we should do the same thing for toKill1
With TLS, a worker (or process) can have a TLS address and non-TLS address.
When a process is created in simulation, the primary address is TLS by default.
The non-TLS one is the TLS address port plus one.
In a connection between two workers, if their primary addresses do not enable
or disable TLS together, one worker will swap its primary address and secondary address
so that the TLS config of the two endpoints can match.
The swap can make the primary address no longer the TLS one that was created
when the process is created. And the swap only happens for worker instead of
process struct in simulation.
This swap can cause worker->address != process->address.
In checkForExtraDataStores actor, we use worker->address to check if a process
is killable and use the process->address to kill the process. The inconsistency
can cause simulation to kill a protected process that is not killable and leads
to simulation failure.
This is the first part of making `TraceEvent` cheaper. The main idea is
to defer calls to any code that formats string. These are the main
changes:
- TraceEvent::detail now takes a c-string instead of std::string for
literals. This prevents unnecessary allocations if the trace is not
going to be printed in the first place (for example for SevDebug).
Before that `detail` expected a `std::string` as key, which mean that
any string literal would be copied on each call.
- Templates Traceable and SpecialTraceMetricType. These templates can be
specialized for any type that needs to be printed. The actual
formatting will be deferred to after the `enabled` check. This
provides two benefits: (1) if a TraceEvent is disabled, we don't pay
for the formatting and (2) TraceEvent can trace types that it doesn't
know about.
- TraceEvent::enabled will be set in the constructor if the Severity is
passed. This will make sure that `TraceEvent::init` is not called.
- `TraceEvent::detail` will be inlined. So for disabled TraceEvent
calls, a call to detail will only introduce a if-branch which is much
cheaper than a function call.
- NetworkAddress now contains IPAddress object which can be either
IPv4 or IPv6 address. 128bits are used even for IPv4 addresses,
however only 32bits are used when using/serializing IPv4 address.
- ConnectPacket is updated to store IPv6 address. Backward compatible
with old format since the first 32bits of IP address field is used
for serialization of IPv4.
- Mainly updates rest of the code to use IPAddress structure instead
of plain uint32_t.
- IPv6 address/pair ports should be represented as `[ip]:port` as per
convention. This applies to both cluster files and command line
arguments.
