NullpointerException in typed receiveSignal #32579
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Ticket is unclear on it's purpose or if it is valid or not
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Can't see that we did any changes around typed Java APIs in 2.9.6, would you be able to provide a minimal reproducer? |
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I think it is using the poolrouter to generate a certain number of actors for a short time and then there is no request for a long time, the idle actor self-destroyed cause NullPointerException |
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The actor will automatically stoped after a certain amount of time without any action
I did not change any project code, only upgraded akka to 2.9.6 or 2.10.0 (2.9.5 and before did not have this problem)
[NullPointerException11451] cause = {NullPointerException@11451} "java.lang.NullPointerException: Cannot invoke "akka.actor.typed.javadsl.Receive.receiveSignal(akka.actor.typed.TypedActorContext, akka.actor.typed.Signal)" because the return value of "akka.actor.typed.javadsl.AbstractBehavior.receive()" is null"
stackTrace = {StackTraceElement[22]@11475}
0 = {StackTraceElement@11479} "akka.actor.typed.javadsl.AbstractBehavior.receiveSignal(AbstractBehavior.scala:70)"
1 = {StackTraceElement@11480} "akka.actor.typed.Behavior$.interpret(Behavior.scala:281)"
2 = {StackTraceElement@11481} "akka.actor.typed.Behavior$.interpretSignal(Behavior.scala:244)"
3 = {StackTraceElement@11482} "akka.actor.typed.internal.adapter.ActorAdapter.postStop(ActorAdapter.scala:321)"
4 = {StackTraceElement@11483} "akka.actor.Actor.aroundPostStop(Actor.scala:561)"
5 = {StackTraceElement@11484} "akka.actor.Actor.aroundPostStop$(Actor.scala:476)"
6 = {StackTraceElement@11485} "akka.actor.typed.internal.adapter.ActorAdapter.aroundPostStop(ActorAdapter.scala:285)"
7 = {StackTraceElement@11486} "akka.actor.dungeon.FaultHandling.finishTerminate(FaultHandling.scala:243)"
8 = {StackTraceElement@11487} "akka.actor.dungeon.FaultHandling.terminate(FaultHandling.scala:200)"
9 = {StackTraceElement@11488} "akka.actor.dungeon.FaultHandling.terminate$(FaultHandling.scala:36)"
10 = {StackTraceElement@11489} "akka.actor.ActorCell.terminate(ActorCell.scala:406)"
11 = {StackTraceElement@11490} "akka.actor.ActorCell.invokeAll$1(ActorCell.scala:515)"
12 = {StackTraceElement@11491} "akka.actor.ActorCell.systemInvoke(ActorCell.scala:531)"
13 = {StackTraceElement@11492} "akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:295)"
14 = {StackTraceElement@11493} "akka.dispatch.Mailbox.run(Mailbox.scala:230)"
15 = {StackTraceElement@11494} "akka.dispatch.Mailbox.exec(Mailbox.scala:243)"
16 = {StackTraceElement@11495} "java.base/java.util.concurrent.ForkJoinTask.doExec$$$capture(ForkJoinTask.java:387)"
17 = {StackTraceElement@11496} "java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java)"
18 = {StackTraceElement@11497} "java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)"
19 = {StackTraceElement@11498} "java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)"
20 = {StackTraceElement@11499} "java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)"
21 = {StackTraceElement@11500} "java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)"
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