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add CoordinatedShutdown, #21537

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* 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
This commit is contained in:
Patrik Nordwall 2016-12-01 18:49:38 +01:00
parent 4a9c753710
commit 84ade6fdc3
69 changed files with 1778 additions and 339 deletions
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7
akka-cluster/src/main/scala/akka/cluster/ClusterEvent.scala
View file

@ -13,6 +13,7 @@ import akka.cluster.ClusterEvent._
import akka.cluster.MemberStatus._
import akka.event.EventStream
import akka.dispatch.{ UnboundedMessageQueueSemantics, RequiresMessageQueue }
import akka.actor.DeadLetterSuppression
/**
* Domain events published to the event bus.
@ -199,7 +200,7 @@ object ClusterEvent {
* This event is published when the cluster node is shutting down,
* before the final [[MemberRemoved]] events are published.
*/
final case object ClusterShuttingDown extends ClusterDomainEvent
final case object ClusterShuttingDown extends ClusterDomainEvent with DeadLetterSuppression
/**
* Java API: get the singleton instance of `ClusterShuttingDown` event
@ -335,9 +336,9 @@ object ClusterEvent {
private[cluster] def diffSeen(oldGossip: Gossip, newGossip: Gossip, selfUniqueAddress: UniqueAddress): immutable.Seq[SeenChanged] =
if (newGossip eq oldGossip) Nil
else {
val newConvergence = newGossip.convergence(selfUniqueAddress)
val newConvergence = newGossip.convergence(selfUniqueAddress, Set.empty)
val newSeenBy = newGossip.seenBy
if (newConvergence != oldGossip.convergence(selfUniqueAddress) || newSeenBy != oldGossip.seenBy)
if (newConvergence != oldGossip.convergence(selfUniqueAddress, Set.empty) || newSeenBy != oldGossip.seenBy)
List(SeenChanged(newConvergence, newSeenBy.map(_.address)))
else Nil
}