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ASF GitHub Bot logged work on BEAM-5211: ---------------------------------------- Author: ASF GitHub Bot Created on: 24/Aug/18 02:54 Start Date: 24/Aug/18 02:54 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-415635661 @angoenka PTAL ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 137647) Time Spent: 1h 10m (was: 1h) > 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 10m > 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)