Hi everybody,
I think I'm in the same issue above described in
https://issues.apache.org/jira/browse/FLINK-6291 . Flink1-6.4
I have had this savepoint with a timer service belonging to a process
function. When I restore a new job w/o the former process function ti fails
in the following way.
What is a valuable workaround for this?
at
org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:641)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:586)
at
org.apache.flink.streaming.runtime.io.BarrierBuffer.notifyCheckpoint(BarrierBuffer.java:396)
at
org.apache.flink.streaming.runtime.io.BarrierBuffer.processBarrier(BarrierBuffer.java:292)
at
org.apache.flink.streaming.runtime.io.BarrierBuffer.getNextNonBlocked(BarrierBuffer.java:200)
at
org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:209)
at
org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:105)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at
org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.snapshotTimersForKeyGroup(InternalTimerServiceImpl.java:264)
at
org.apache.flink.streaming.api.operators.InternalTimerServiceSerializationProxy.write(InternalTimerServiceSerializationProxy.java:90)
at
org.apache.flink.streaming.api.operators.InternalTimeServiceManager.snapshotStateForKeyGroup(InternalTimeServiceManager.java:139)
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:452)
... 15 more
Really thank you,
Andrea
Il giorno mar 11 apr 2017 alle ore 10:49 Gyula Fora (JIRA) <j...@apache.org>
ha scritto:
> Gyula Fora created FLINK-6291:
> ---------------------------------
>
> Summary: Internal Timer service cannot be "removed"
> Key: FLINK-6291
> URL: https://issues.apache.org/jira/browse/FLINK-6291
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing, Streaming
> Affects Versions: 1.2.0
> Reporter: Gyula Fora
>
>
> Currently it is not possible to register an internal timer service in one
> job and remove it after a savepoint as a nullpointer exception is thrown in
> the next savepoint:
>
> Caused by: java.lang.Exception: Could not write timer service of
> MyOperator (17/60) to checkpoint state stream.
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:418)
> at
> com.king.rbea.backend.operators.scriptexecution.RBEAOperator.snapshotState(RBEAOperator.java:327)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:357)
> ... 13 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.flink.streaming.api.operators.HeapInternalTimerService.snapshotTimersForKeyGroup(HeapInternalTimerService.java:294)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:414)
> ... 15 more
>
> The timer serializer is null in this case as the timer service has never
> been started properly.
>
> We should probably discard the timers for the services that are not
> reregistered after restore so we can get rid of the state completely.
>
>
>
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--
*Andrea Spina*
Head of R&D @ Radicalbit Srl
Via Giovanni Battista Pirelli 11, 20124, Milano - IT
