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https://issues.apache.org/jira/browse/FLINK-6291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuan Mei updated FLINK-6291:
----------------------------
Priority: Minor (was: Not a Priority)
> Internal Timer service cannot be "removed"
> ------------------------------------------
>
> Key: FLINK-6291
> URL: https://issues.apache.org/jira/browse/FLINK-6291
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream, Runtime / State Backends
> Affects Versions: 1.2.0
> Reporter: Gyula Fora
> Priority: Minor
> Labels: auto-deprioritized-major, auto-deprioritized-minor
>
> 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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