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https://issues.apache.org/jira/browse/BEAM-5211?focusedWorklogId=137630&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-137630
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ASF GitHub Bot logged work on BEAM-5211:
----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Aug/18 00:37
Start Date: 24/Aug/18 00:37
Worklog Time Spent: 10m
Work Description: angoenka commented on a change in pull request #6271:
[BEAM-5211] Flink Streaming ExecutableStage operator chain blocks grpc receiver
threads
URL: https://github.com/apache/beam/pull/6271#discussion_r212489970
##########
File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/ExecutableStageDoFnOperator.java
##########
@@ -137,12 +137,32 @@ private void
processElementWithSdkHarness(WindowedValue<InputT> element) throws
checkState(
stateRequestHandler != null, "%s not yet prepared",
StateRequestHandler.class.getName());
Review comment:
Shall we use a queue here to avoid synchronized
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Issue Time Tracking
-------------------
Worklog Id: (was: 137630)
Time Spent: 0.5h (was: 20m)
> Flink Streaming ExecutableStage operator chain blocks grpc receiver threads
> ----------------------------------------------------------------------------
>
> Key: BEAM-5211
> URL: https://issues.apache.org/jira/browse/BEAM-5211
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.6.0
> Reporter: Thomas Weise
> Assignee: Thomas Weise
> Priority: Major
> Labels: portability
> Fix For: 2.7.0
>
> Attachments: jstack.log
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The operator attempts to emit results as they are received, within the grpc
> thread, while the subtask thread is waiting for bundle completion. This leads
> to blocking of grpc threads and eventually deadlock when multiple stages are
> within an operator chain. Observed with wordcount, see attached stacktrace.
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