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https://issues.apache.org/jira/browse/FLINK-10747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16671749#comment-16671749
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ASF GitHub Bot commented on FLINK-10747:
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tillrohrmann opened a new pull request #6992: [FLINK-10747] Update
SingleInputGate#requestedPartitionsFlag under lock
URL: https://github.com/apache/flink/pull/6992
## What is the purpose of the change
In order to avoid a race condition between SingleInputGate#requestPartitions
and
SingleInputGate#updateInputChannel we need to change the field
requestedPartitionsFlag
under the requestLock.
This PR fixes a problem introduced by #6974.
## Verifying this change
- Manually tested
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (yes)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
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> CoGroupConnectedComponentsITCase deadlocked on Travis
> -----------------------------------------------------
>
> Key: FLINK-10747
> URL: https://issues.apache.org/jira/browse/FLINK-10747
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 1.7.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Priority: Blocker
> Labels: pull-request-available, test-stability
> Fix For: 1.7.0
>
>
> The {{CoGroupConnectedComponentsITCase}} deadlocks on Travis:
> https://api.travis-ci.org/v3/job/449230962/log.txt.
> It looks as if the iteration gets stuck and waits
> {{SuperstepKickoffLatch.awaitStartOfSuperstepOrTermination}} without ever
> getting a proper notification. This might indicate a serious bug in our
> iteration implementation. This could also be related to FLINK-10741.
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