* image-liveness-timeout must be less than the handshake-timeout,
otherwise the publication for the handshake will give up too early
when previous image is still considered alive
* they can't be stopped immediately because we want to send
some final message and we reply to inbound messages with `Quarantined`
* and improve logging
* Setting to configure where the flight recorder puts its file
* Run ArteryMultiNodeSpecs with flight recorder enabled
* More cleanup in exit hook, wait for task runner to stop
* Enable flight recorder for the cluster multi node tests
* Enable flight recorder for multi node remoting tests
* Toggle always-dump flight recorder output when akka.remote.artery.always-dump-flight-recorder is set
* need to use a shared media driver to get the cpu usage
at a reasonable level
* also changed to SleepingIdleStrategy(1 ms) when cpu-level=1
not needed for the test to pass, but can be good to make level 1
more extreme
* Don't quarantine the other system when receiving the Quarantined message,
since that will result cluster member removal and can result in
forming two separate clusters (cluster split).
* Instead, the downing strategy should act on ThisActorSystemQuarantinedEvent, e.g.
use it as a STONITH signal.
* track nodes by UniqueAddress in Cluster Singleton, #20942
* reply with HandOverDone from new incarnation, #20942
* confirm as terminated immediately when new incarnation joins, #20942 instead of waiting for failure detector to mark it as unreachable this will speed-up removal when restarting cluster node with same hostname:port
* Provide shorter aliases for the ActorRefProviders #20649
* Use the new actorefprovider aliases throughout code and docs
* Cleaner alias replacement logic
* Automatic port selection when port 0 configured
* Combine remoting and artery SunnyWeatherSpec
* Default to port 0 for artery in MultiNodeSpec.nodeConfig
* minor fixes
* remove now superfluous buffer from MultipartUnmarshaller
* remove unused TokenSourceActor
* remove FIXME: add tests, see #16437
* removed unused param remoteAddress (comment: TODO: remove after #16168 is cleared)
* convert FIXME to TODO (#18709)
* reenable tests in {Request|Response}RendererSpec due to fixed#15981
* remove logging workaround in StreamTestDefaultMailbox due to fixed#15947
* The problem: ACK that was targeted to an old incarnation
was sent to the new, restarted, system with same host:port, and
therefore resulting issues noticed as
"Error encountered while processing system message acknowledgement buffer: [-1 {}] ack: ACK[0, {}]"
when restarting actor system
* The reason:
1. The endpoint reader was about to send OutgoingAck to parent reader,
targeted to the old system.
2. At the same time there is an incoming connection from new system
that triggered TakeOver in the endpoint writer, i.e. replacing
the handle to the connection of the new system.
3. The OutgoingAck is received by the writer, which happily sends it
to the new handle, the new system.
* The solution: Ignore OutgoingAck during the handoff (TakeOver) process.
