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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/04/09 21:16:00 UTC
[jira] [Work logged] (BEAM-9651) StreamingDataflowWorker stuck
waiting for
org.apache.beam.runners.dataflow.worker.windmill.DirectStreamObserver.onNext
[ https://issues.apache.org/jira/browse/BEAM-9651?focusedWorklogId=419782&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-419782 ]
ASF GitHub Bot logged work on BEAM-9651:
----------------------------------------
Author: ASF GitHub Bot
Created on: 09/Apr/20 21:15
Start Date: 09/Apr/20 21:15
Worklog Time Spent: 10m
Work Description: scwhittle commented on pull request #11364: [BEAM-9651] Prevent StreamPool and stream initialization livelock
URL: https://github.com/apache/beam/pull/11364
Reduce StreamPool synchronized block section to not include stream
creation which includes sending initial messages. Additionally remove it from being
required to release holds. Some pipelines were observing stuck get and
release methods on synchronization. This was due to a stuck stream
creation waiting for the onReady callback. This could possibly have
been due to the callback being queued behind other callbacks on
blocked grpc threads. This was addressed in the DirectStreamObserver
used for the fn api so we reuse it here.
------------------------
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Post-Commit Tests Status (on master branch)
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--- | --- | --- | --- | --- | --- | --- | ---
Go | [](https://builds.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Flink/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Spark/lastCompletedBuild/)
Java | [](https://builds.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow_Java11/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Flink/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Streaming/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Gearpump/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Spark/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Spark_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_SparkStructuredStreaming/lastCompletedBuild/)
Python | [](https://builds.apache.org/job/beam_PostCommit_Python2/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python35/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python37/lastCompletedBuild/) | --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow_V2/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/) | [](https://builds.apache.org/job/beam_PreCommit_Python2_PVR_Flink_Cron/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python35_VR_Flink/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/)
XLang | --- | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_XVR_Flink/lastCompletedBuild/) | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_XVR_Spark/lastCompletedBuild/)
Pre-Commit Tests Status (on master branch)
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Issue Time Tracking
-------------------
Worklog Id: (was: 419782)
Remaining Estimate: 0h
Time Spent: 10m
> StreamingDataflowWorker stuck waiting for org.apache.beam.runners.dataflow.worker.windmill.DirectStreamObserver.onNext
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-9651
> URL: https://issues.apache.org/jira/browse/BEAM-9651
> Project: Beam
> Issue Type: Bug
> Components: runner-dataflow
> Reporter: Sam Whittle
> Assignee: Sam Whittle
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Operation ongoing in step <redacted> for at least 28h10m00s without outputting or completing in state windmill-read at sun.misc.Unsafe.park(Native Method) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.Phaser$QNode.block(Phaser.java:1140) at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323) at java.util.concurrent.Phaser.internalAwaitAdvance(Phaser.java:1067) at java.util.concurrent.Phaser.awaitAdvanceInterruptibly(Phaser.java:758) at org.apache.beam.runners.dataflow.worker.windmill.DirectStreamObserver.onNext(DirectStreamObserver.java:49) at org.apache.beam.runners.dataflow.worker.windmill.GrpcWindmillServer$AbstractWindmillStream.send(GrpcWindmillServer.java:615) at org.apache.beam.runners.dataflow.worker.windmill.GrpcWindmillServer$GrpcGetDataStream.onNewStream(GrpcWindmillServer.java:946) at org.apache.beam.runners.dataflow.worker.windmill.GrpcWindmillServer$AbstractWindmillStream.startStream(GrpcWindmillServer.java:628) at org.apache.beam.runners.dataflow.worker.windmill.GrpcWindmillServer$GrpcGetDataStream.<init>(GrpcWindmillServer.java:941) at org.apache.beam.runners.dataflow.worker.windmill.GrpcWindmillServer.getDataStream(GrpcWindmillServer.java:506) at org.apache.beam.runners.dataflow.worker.MetricTrackingWindmillServerStub$$Lambda$129/665137804.get(Unknown Source) at org.apache.beam.runners.dataflow.worker.windmill.WindmillServerStub$StreamPool$StreamData.<init>(WindmillServerStub.java:159) at org.apache.beam.runners.dataflow.worker.windmill.WindmillServerStub$StreamPool$StreamData.<init>(WindmillServerStub.java:158) at org.apache.beam.runners.dataflow.worker.windmill.WindmillServerStub$StreamPool.getStream(WindmillServerStub.java:191) at org.apache.beam.runners.dataflow.worker.MetricTrackingWindmillServerStub.getStateData(MetricTrackingWindmillServerStub.java:199) at org.apache.beam.runners.dataflow.worker.WindmillStateReader.startBatchAndBlock(WindmillStateReader.java:433) at org.apache.beam.runners.dataflow.worker.WindmillStateReader$WrappedFuture.get(WindmillStateReader.java:328) at org.apache.beam.runners.dataflow.worker.WindmillStateInternals$WindmillValue.read(WindmillStateInternals.java:389) at
> <redacted>
> Because the stream is started in a StreamPool synchronized block, all other threads interacting with StreamPool to get or release streams end up blocking.
> It is unclear if the stream never became usable and thus blocked forever or if there is a race with the use of the Phaser that causes the stuckness.
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