* moved to cluster tests, in new package akka.cluster.testkit
* changed config in tests
* migration guide
* documentation clarificiations for Downing and Leaving
* update warnings in Singleton and Sharding
* methods like cluster.join and cluster.subscribe may throw exception if called
with invalid parameters
* the manager and subscriptions actors should survive such exceptions
* Update Jackson to 2.10.0
* Support configuration for new features introduced in Jackson 2.10
* WRITE_DURATIONS_AS_TIMESTAMPS is the new config used to serialize durations
Previously WRITE_DATES_AS_TIMESTAMPS was used for both date/time and duration, but
in Jackson 2.10 WRITE_DURATIONS_AS_TIMESTAMPS is used for durations, so it needs to
be configured consistently with WRITE_DATES_AS_TIMESTAMPS.
* Not working for mysterious reasons
* Fix for #27507 race in test
Logging at debug to try if there is a race when testing on Jenkins
Also, fail fast if expecting a signal from a TestProbe (never happens)
Some minor logging improvements for event sourced behavior as well.
* Don't send batches of events when snapshot and event deletion is enabled
When events are deleted the event sourced actor switches to running until it gets
an ack back from the journal about deleting events, then it deletes snapshots if that
is enabled. This means events and snapshotting could happen inbetween making the
ordering of SnapshotComplete and DeleteSnapshotsComplete signals non deterministic.
* Config to exclude class prefix from serialize-messages, #24273
* Adding no-serialization-verification-needed-class-prefix, with "akka." included
by default
* This is important now when we disable Java serialization by default.
There will be many complaints about Akka internal classes that are not marked with
NoSerializationVerificationNeeded, and we can't really sprinkle that everywhere.
* Not removing NoSerializationVerificationNeeded usage in Akka classes because that
may break bin compat, even though it's needed any more.
* fix DisabledJavaSerializerWarningSpec
* Eager creation of system materializer on system startup #26850
* System level materializers always spawned under a specific system actor #26850
* No need for RepointableActorRef logic anymore
* MiMa filter
* Make the creation timeout higher
