He-Pin commented on issue #1646:
URL: https://github.com/apache/pekko/issues/1646#issuecomment-2566151493
```
[ERROR] [12/31/2024 13:43:24.671]
[ActorGraphInterpreterSpec-pekko.actor.default-dispatcher-6]
[pekko://ActorGraphInterpreterSpec/system/Materializers/StreamSupervisor-0/flow-0-0-broadcast]
Error during postStop in [ActorOutputBoundary(port=Broadcast.out0(416201381),
demand=0, finished=false)]: null
java.lang.NullPointerException
at
org.apache.pekko.stream.stage.GraphStageLogic.afterPostStop(GraphStage.scala:1378)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.finalizeStage(GraphInterpreter.scala:615)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.afterStageHasRun(GraphInterpreter.scala:594)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.execute(GraphInterpreter.scala:404)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreterShell.runBatch(ActorGraphInterpreter.scala:662)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$SimpleBoundaryEvent.execute(ActorGraphInterpreter.scala:71)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$SimpleBoundaryEvent.execute$(ActorGraphInterpreter.scala:67)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$RequestMore.execute(ActorGraphInterpreter.scala:299)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreterShell.processEvent(ActorGraphInterpreter.scala:637)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.org$apache$pekko$stream$impl$fusing$ActorGraphInterpreter$$processEvent(ActorGraphInterpreter.scala:813)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$$anonfun$receive$1.applyOrElse(ActorGraphInterpreter.scala:831)
at org.apache.pekko.actor.Actor.aroundReceive(Actor.scala:547)
at org.apache.pekko.actor.Actor.aroundReceive$(Actor.scala:545)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.aroundReceive(ActorGraphInterpreter.scala:729)
at org.apache.pekko.actor.ActorCell.receiveMessage(ActorCell.scala:590)
at org.apache.pekko.actor.ActorCell.invoke(ActorCell.scala:557)
at org.apache.pekko.dispatch.Mailbox.processMailbox(Mailbox.scala:280)
at org.apache.pekko.dispatch.Mailbox.run(Mailbox.scala:241)
at org.apache.pekko.dispatch.Mailbox.exec(Mailbox.scala:253)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
at
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
[ERROR] [12/31/2024 13:43:24.718]
[ActorGraphInterpreterSpec-pekko.actor.default-dispatcher-5]
[pekko://ActorGraphInterpreterSpec/system/Materializers/StreamSupervisor-0/flow-1-0-broadcast]
Error during postStop in [ActorOutputBoundary(port=Broadcast.out0(1057507014),
demand=0, finished=false)]: null
java.lang.NullPointerException
at
org.apache.pekko.stream.stage.GraphStageLogic.afterPostStop(GraphStage.scala:1378)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.finalizeStage(GraphInterpreter.scala:615)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.afterStageHasRun(GraphInterpreter.scala:594)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreter.execute(GraphInterpreter.scala:404)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreterShell.runBatch(ActorGraphInterpreter.scala:662)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$SimpleBoundaryEvent.execute(ActorGraphInterpreter.scala:71)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$SimpleBoundaryEvent.execute$(ActorGraphInterpreter.scala:67)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$RequestMore.execute(ActorGraphInterpreter.scala:299)
at
org.apache.pekko.stream.impl.fusing.GraphInterpreterShell.processEvent(ActorGraphInterpreter.scala:637)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.org$apache$pekko$stream$impl$fusing$ActorGraphInterpreter$$processEvent(ActorGraphInterpreter.scala:813)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter$$anonfun$receive$1.applyOrElse(ActorGraphInterpreter.scala:831)
at org.apache.pekko.actor.Actor.aroundReceive(Actor.scala:547)
at org.apache.pekko.actor.Actor.aroundReceive$(Actor.scala:545)
at
org.apache.pekko.stream.impl.fusing.ActorGraphInterpreter.aroundReceive(ActorGraphInterpreter.scala:729)
at org.apache.pekko.actor.ActorCell.receiveMessage(ActorCell.scala:590)
at org.apache.pekko.actor.ActorCell.invoke(ActorCell.scala:557)
at org.apache.pekko.dispatch.Mailbox.processMailbox(Mailbox.scala:280)
at org.apache.pekko.dispatch.Mailbox.run(Mailbox.scala:241)
at org.apache.pekko.dispatch.Mailbox.exec(Mailbox.scala:253)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
at
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
```
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