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https://issues.apache.org/jira/browse/BEAM-5211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Weise updated BEAM-5211:
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Description: 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. (was: 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. See attached
stacktrace.)
> 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
>
>
> 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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