Hi Dawid, I've upgraded to flink 1.6.1 and rebased by changes against the tag 1.6.1, the only commit on top of 1.6 is this: https://github.com/jainshailesh/flink/commit/797e3c4af5b28263fd98fb79daaba97cabf3392c
I ran two separate identical jobs (with and without checkpointing enabled), I'm hitting a ArrayIndexOutOfBoundsException (and sometimes NPE) *only when checkpointing (HDFS backend) is enabled*, with the below stack trace. I did see a similar problem with different operators here ( http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/IndexOutOfBoundsException-on-deserialization-after-updating-to-1-6-1-td23933.html). Is this a known issue which is getting addressed? Any ideas on what could be causing this? Thanks, Shailesh 2018-10-24 17:04:13,365 INFO org.apache.flink.runtime.taskmanager.Task - SelectCepOperatorMixedTime (1/1) - SelectCepOperatorMixedTime (1/1) (3d984b7919342a3886593401088ca2cd) switched from RUNNING to FAILED. org.apache.flink.util.FlinkRuntimeException: Failure happened in filter function. at org.apache.flink.cep.nfa.NFA.createDecisionGraph(NFA.java:731) at org.apache.flink.cep.nfa.NFA.computeNextStates(NFA.java:541) at org.apache.flink.cep.nfa.NFA.doProcess(NFA.java:284) at org.apache.flink.cep.nfa.NFA.process(NFA.java:220) at org.apache.flink.cep.operator.AbstractKeyedCEPPatternOperator.processEvent(AbstractKeyedCEPPatternOperator.java:379) at org.apache.flink.cep.operator.AbstractKeyedCEPPatternMixedTimeApproachOperator.processElement(AbstractKeyedCEPPatternMixedTimeApproachOperator.java:45) at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:202) 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: org.apache.flink.util.WrappingRuntimeException: java.lang.ArrayIndexOutOfBoundsException: -1 at org.apache.flink.cep.nfa.sharedbuffer.SharedBuffer.lambda$materializeMatch$1(SharedBuffer.java:305) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at org.apache.flink.cep.nfa.sharedbuffer.SharedBuffer.materializeMatch(SharedBuffer.java:301) at org.apache.flink.cep.nfa.sharedbuffer.SharedBuffer.materializeMatch(SharedBuffer.java:291) at org.apache.flink.cep.nfa.NFA$ConditionContext.getEventsForPattern(NFA.java:811) at com.stellapps.contrakcep.flink.patterns.critical.AgitatorMalfunctionAfterChillingPattern$1.filter(AgitatorMalfunctionAfterChillingPattern.java:70) at com.stellapps.contrakcep.flink.patterns.critical.AgitatorMalfunctionAfterChillingPattern$1.filter(AgitatorMalfunctionAfterChillingPattern.java:62) at org.apache.flink.cep.nfa.NFA.checkFilterCondition(NFA.java:742) at org.apache.flink.cep.nfa.NFA.createDecisionGraph(NFA.java:716) ... 10 more Caused by: java.lang.ArrayIndexOutOfBoundsException: -1 at com.esotericsoftware.kryo.util.IntArray.add(IntArray.java:61) at com.esotericsoftware.kryo.Kryo.readReferenceOrNull(Kryo.java:800) at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:655) at org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.copy(KryoSerializer.java:231) at org.apache.flink.cep.nfa.sharedbuffer.Lockable$LockableTypeSerializer.copy(Lockable.java:120) at org.apache.flink.cep.nfa.sharedbuffer.Lockable$LockableTypeSerializer.copy(Lockable.java:95) at org.apache.flink.api.common.typeutils.base.MapSerializer.copy(MapSerializer.java:113) at org.apache.flink.api.common.typeutils.base.MapSerializer.copy(MapSerializer.java:49) at org.apache.flink.runtime.state.heap.CopyOnWriteStateTable.get(CopyOnWriteStateTable.java:287) at org.apache.flink.runtime.state.heap.CopyOnWriteStateTable.get(CopyOnWriteStateTable.java:311) at org.apache.flink.runtime.state.heap.HeapMapState.get(HeapMapState.java:85) at org.apache.flink.runtime.state.UserFacingMapState.get(UserFacingMapState.java:47) at org.apache.flink.cep.nfa.sharedbuffer.SharedBuffer.lambda$materializeMatch$1(SharedBuffer.java:303) ... 18 more On Fri, Sep 28, 2018 at 11:00 AM Shailesh Jain <shailesh.j...@stellapps.com> wrote: > Hi Dawid, > > Thanks for your time on this. The diff should have pointed out only the > top 3 commits, but since it did not, it is possible I did not rebase my > branch against 1.4.2 correctly. I'll check this out and get back to you if > I hit the same issue again. > > Thanks again, > Shailesh > > On Thu, Sep 27, 2018 at 1:00 PM Dawid Wysakowicz <dwysakow...@apache.org> > wrote: > >> Hi Shailesh, >> >> I am afraid it is gonna be hard to help you, as this branch differs >> significantly from 1.4.2 release (I've done diff across your branch and >> tag/release-1.4.2). Moreover the code in the branch you've provided still >> does not correspond to the lines in the exception you've posted previously. >> Could you check if the problem occurs on vanilla flink as well? >> >> Best, >> >> Dawid >> >> On 27/09/18 08:22, Shailesh Jain wrote: >> >> Hi Dawid, >> >> Yes, it is version 1.4.2. We are running vanilla flink, but have added a >> couple of changes in the CEP operator specifically (top 3 commits here: >> https://github.com/jainshailesh/flink/commits/poc_on_1.4.2). Changes >> I've made to CEP operators do not touch the checkpointing path, just >> overloading the operator for a specific way of handling event time. >> >> We are hitting this in production, so I'm not sure it'll be feasible to >> move to 1.6.0 immediately, but eventually yes. >> >> Thanks, >> Shailesh >> >> On Wed, Sep 26, 2018 at 5:44 PM Dawid Wysakowicz <dwysakow...@apache.org> >> wrote: >> >>> Hi Shailesh, >>> >>> Are you sure you are using version 1.4.2? Do you run a vanilla flink, or >>> have you introduced some changes? I am asking cause the lines in stacktrace >>> does not align with the source code for 1.4.2. >>> >>> Also it is a different exception than the one in the issue you've >>> linked, so if it is a problem than it is definitely a different one. Last >>> thing I would recommend upgrading to the newest version, as we rewritten >>> the SharedBuffer implementation in 1.6.0. >>> >>> Best, >>> >>> Dawid >>> >>> On 26/09/18 13:50, Shailesh Jain wrote: >>> >>> Hi, >>> >>> I think I've hit this same issue on a 3 node standalone cluster (1.4.2) >>> using HDFS (2.8.4) as state backend. >>> >>> 2018-09-26 17:07:39,370 INFO >>> org.apache.flink.runtime.taskmanager.Task - Attempting >>> to fail task externally SelectCepOperator (1/1) >>> (3bec4aa1ef2226c4e0c5ff7b3860d340). >>> 2018-09-26 17:07:39,370 INFO >>> org.apache.flink.runtime.taskmanager.Task - >>> SelectCepOperator (1/1) (3bec4aa1ef2226c4e0c5ff7b3860d340) switched from >>> RUNNING to FAILED. >>> AsynchronousException{java.lang.Exception: Could not materialize >>> checkpoint 6 for operator SelectCepOperator (1/1).} >>> at >>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:948) >>> at >>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) >>> at java.util.concurrent.FutureTask.run(FutureTask.java:266) >>> at >>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) >>> at >>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) >>> at java.lang.Thread.run(Thread.java:748) >>> Caused by: java.lang.Exception: Could not materialize checkpoint 6 for >>> operator SelectCepOperator (1/1). >>> ... 6 more >>> Caused by: java.util.concurrent.ExecutionException: >>> java.lang.NullPointerException >>> at java.util.concurrent.FutureTask.report(FutureTask.java:122) >>> at java.util.concurrent.FutureTask.get(FutureTask.java:192) >>> at >>> org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:43) >>> at >>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:894) >>> ... 5 more >>> Suppressed: java.lang.Exception: Could not properly cancel managed >>> keyed state future. >>> at >>> org.apache.flink.streaming.api.operators.OperatorSnapshotResult.cancel(OperatorSnapshotResult.java:91) >>> at >>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.cleanup(StreamTask.java:976) >>> at >>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:939) >>> ... 5 more >>> Caused by: java.util.concurrent.ExecutionException: >>> java.lang.NullPointerException >>> at java.util.concurrent.FutureTask.report(FutureTask.java:122) >>> at java.util.concurrent.FutureTask.get(FutureTask.java:192) >>> at >>> org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:43) >>> at >>> org.apache.flink.runtime.state.StateUtil.discardStateFuture(StateUtil.java:66) >>> at >>> org.apache.flink.streaming.api.operators.OperatorSnapshotResult.cancel(OperatorSnapshotResult.java:89) >>> ... 7 more >>> Caused by: java.lang.NullPointerException >>> at >>> org.apache.flink.cep.nfa.SharedBuffer$SharedBufferSerializer.serialize(SharedBuffer.java:954) >>> at >>> org.apache.flink.cep.nfa.SharedBuffer$SharedBufferSerializer.serialize(SharedBuffer.java:825) >>> at >>> org.apache.flink.cep.nfa.NFA$NFASerializer.serialize(NFA.java:888) >>> at >>> org.apache.flink.cep.nfa.NFA$NFASerializer.serialize(NFA.java:820) >>> at >>> org.apache.flink.runtime.state.heap.CopyOnWriteStateTableSnapshot.writeMappingsInKeyGroup(CopyOnWriteStateTableSnapshot.java:196) >>> at >>> org.apache.flink.runtime.state.heap.HeapKeyedStateBackend$1.performOperation(HeapKeyedStateBackend.java:390) >>> at >>> org.apache.flink.runtime.state.heap.HeapKeyedStateBackend$1.performOperation(HeapKeyedStateBackend.java:339) >>> at >>> org.apache.flink.runtime.io.async.AbstractAsyncCallableWithResources.call(AbstractAsyncCallableWithResources.java:75) >>> at java.util.concurrent.FutureTask.run(FutureTask.java:266) >>> at >>> org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:40) >>> at >>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:894) >>> ... 5 more >>> [CIRCULAR REFERENCE:java.lang.NullPointerException] >>> >>> Any ideas on why I'm hitting this especially when this ( >>> https://issues.apache.org/jira/browse/FLINK-7756) says it has been >>> fixed in 1.4.2 ? >>> >>> On Sat, Nov 4, 2017 at 12:34 AM Federico D'Ambrosio < >>> federico.dambro...@smartlab.ws> wrote: >>> >>>> Thank you very much for your steady response, Kostas! >>>> >>>> Cheers, >>>> Federico >>>> >>>> 2017-11-03 16:26 GMT+01:00 Kostas Kloudas <k.klou...@data-artisans.com> >>>> : >>>> >>>>> Hi Federico, >>>>> >>>>> Thanks for trying it out! >>>>> Great to hear that your problem was fixed! >>>>> >>>>> The feature freeze for the release is going to be next week, and I >>>>> would expect 1 or 2 more weeks testing. >>>>> So I would say in 2.5 weeks. But this is of course subject to >>>>> potential issues we may find during testing. >>>>> >>>>> Cheers, >>>>> Kostas >>>>> >>>>> On Nov 3, 2017, at 4:22 PM, Federico D'Ambrosio < >>>>> federico.dambro...@smartlab.ws> wrote: >>>>> >>>>> Hi Kostas, >>>>> >>>>> I just tried running the same job with 1.4-SNAPSHOT for 10 minutes and >>>>> it didn't crash, so that was the same underlying issue of the JIRA you >>>>> linked. >>>>> >>>>> Do you happen to know when it's expected the 1.4 stable release? >>>>> >>>>> Thank you very much, >>>>> Federico >>>>> >>>>> 2017-11-03 15:25 GMT+01:00 Kostas Kloudas <k.klou...@data-artisans.com >>>>> >: >>>>> >>>>>> Perfect! thanks a lot! >>>>>> >>>>>> Kostas >>>>>> >>>>>> On Nov 3, 2017, at 3:23 PM, Federico D'Ambrosio < >>>>>> federico.dambro...@smartlab.ws> wrote: >>>>>> >>>>>> Hi Kostas, >>>>>> >>>>>> yes, I'm using 1.3.2. I'll try the current master and I'll get back >>>>>> to you. >>>>>> >>>>>> 2017-11-03 15:21 GMT+01:00 Kostas Kloudas < >>>>>> k.klou...@data-artisans.com>: >>>>>> >>>>>>> Hi Federico, >>>>>>> >>>>>>> I assume that you are using Flink 1.3, right? >>>>>>> >>>>>>> In this case, in 1.4 we have fixed a bug that seems similar to your >>>>>>> case: >>>>>>> https://issues.apache.org/jira/browse/FLINK-7756 >>>>>>> >>>>>>> Could you try the current master to see if it fixes your problem? >>>>>>> >>>>>>> Thanks, >>>>>>> Kostas >>>>>>> >>>>>>> On Nov 3, 2017, at 3:12 PM, Federico D'Ambrosio < >>>>>>> federico.dambro...@smartlab.ws> wrote: >>>>>>> >>>>>>> Could not find id for >>>>>>> entry: >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Federico D'Ambrosio >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> Federico D'Ambrosio >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> Federico D'Ambrosio >>>> >>> >>> >>
