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https://issues.apache.org/jira/browse/BEAM-5211?focusedWorklogId=137650&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-137650
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ASF GitHub Bot logged work on BEAM-5211:
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Author: ASF GitHub Bot
Created on: 24/Aug/18 03:06
Start Date: 24/Aug/18 03:06
Worklog Time Spent: 10m
Work Description: tweise commented on issue #6271: [BEAM-5211] Flink
Streaming ExecutableStage operator chain blocks grpc receiver threads
URL: https://github.com/apache/beam/pull/6271#issuecomment-415637350
After this change flinkCompatibilityMatrixStreaming reports 6 errors that
are all side input related, which is what we expect to see.
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Issue Time Tracking
-------------------
Worklog Id: (was: 137650)
Time Spent: 1h 20m (was: 1h 10m)
> 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: 1h 20m
> 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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