* CoordinatedShutdown that can run tasks for configured phases in order (DAG)
* coordinate handover/shutdown of singleton with cluster exiting/shutdown
* phase config obj with depends-on list
* integrate graceful leaving of sharding in coordinated shutdown
* add timeout and recover
* add some missing artery ports to tests
* leave via CoordinatedShutdown.run
* optionally exit-jvm in last phase
* run via jvm shutdown hook
* send ExitingConfirmed to leader before shutdown of Exiting
to not have to wait for failure detector to mark it as
unreachable before removing
* the unreachable signal is still kept as a safe guard if
message is lost or leader dies
* PhaseClusterExiting vs MemberExited in ClusterSingletonManager
* terminate ActorSystem when cluster shutdown (via Down)
* add more predefined and custom phases
* reference documentation
* migration guide
* problem when the leader order was sys2, sys1, sys3,
then sys3 could not perform it's duties and move Leving sys1 to
Exiting because it was observing sys1 as unreachable
* exclude Leaving with exitingConfirmed from convergence condidtion
* WIP early preview of moving compressions ownership to Decoder
* Compression table created in transport, but owned by Decoder
Added test for restart of inbound stream
* =art snapshot not needed in HeavyHitters since owned by Decoder
- All Map types are now generic in their key: ORMap, ORMultiMap, LWWMap,
PNCounterMap
- test for binary compatibility with previous version for serialization
- entries are sorted for deterministic SHA-1 on same value
The TCK tests are using System.gc(), which
is causing long GC pauses when running with G1 on
the CI build servers. Therefore we fork these tests
to run with small heap without G1.
Benchmarks revealed that busy spinning directly in the graph stage can
lead to an excessive increase in latency when multiple inbound lanes are
active (i.e. the inbound flow has an asynchronous boundary driving the
multiple lanes).
The new strategy is therefore:
For inbound-lanes > 1 or idle-cpu-level < 5: no spinning in the graph stage
For inbound-lanes = 1 and idle-cpu-level >= 6: 50 * settings.Advanced.IdleCpuLevel - 240
which means in general much less or no spinning at all.
Fixes#21365.
This needed the other change for each sender to send to all of the target
actors. Otherwise, large batches of messages to the same target actor would
limit the potential of actually doing work in parallel with multiple lanes due
to head-of-line blocking.
It was reported that shared media driver performance can depend on the
kind of file-system where the files are contained. /dev/shm is an in-memory
filesystem that was reported to work well with the shared aeron media driver.
