KAFKA-19960: Close pending tasks on shutdown. (#21365) #21422
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This PR fixes a bug when KS doesn't close stores if the shutdown was triggered during rebalance where an active tasks gets converted to a standby one and put into pendingTasksToInit * Added logic to close pending tasks to init. * Made standby task closure similar to the one for active tasks. * Added a separate method for getting standby tasks from task registry. * Added an integration test that reproduces the issue. Reviewers: Matthias J. Sax <matthias@confluent.io> --------- Co-authored-by: Matthias J. Sax <mjsax@apache.org> Conflicts: streams/src/test/java/org/apache/kafka/streams/processor/internals/TaskManagerTest.java
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cherry pick of #21365 |
mjsax
approved these changes
Feb 9, 2026
mjsax
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Feb 9, 2026
| // and starting the shutdown directly | ||
| // We don't want to let the rebalance finish before we trigger the shutdown, because we want the stream thread to stop before it gets to moving pending tasks from task registry to state updater. | ||
| streams1.close(new KafkaStreams.CloseOptions().leaveGroup(true)); | ||
| streams2.close(new KafkaStreams.CloseOptions().leaveGroup(true)); |
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This doesn't work as expected (that's why it was change in newer release). It only works for static members.
In 4.0, there is an internal config that we should use instead.
mjsax
approved these changes
Feb 9, 2026
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Cherry-pick of #21365.
This PR fixes a bug when KS doesn't close stores if the shutdown was
triggered during rebalance where an active tasks gets converted to a
standby one and put into pendingTasksToInit
Reviewers: Matthias J. Sax matthias@confluent.io
Conflicts:
streams/src/test/java/org/apache/kafka/streams/processor/internals/TaskManagerTest.java
Additional changes:
streams/integration-tests/src/test/java/org/apache/kafka/streams/integration/RebalanceTaskClosureIntegrationTest.java