Jason Gustafson created KAFKA-6593:
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Summary: Coordinator disconnect in heartbeat thread can cause
commitSync to block indefinitely
Key: KAFKA-6593
URL: https://issues.apache.org/jira/browse/KAFKA-6593
Project: Kafka
Issue Type: Bug
Components: consumer
Affects Versions: 0.11.0.2, 1.0.0
Reporter: Jason Gustafson
Assignee: Jason Gustafson
If a coordinator disconnect is observed in the heartbeat thread, it can cause a
pending offset commit to be cancelled just before the foreground thread begins
waiting on its response in poll(). Since the poll timeout is Long.MAX_VALUE,
this will cause the consumer to effectively hang until some other network event
causes the poll() to return. We try to protect this case with a poll condition
on the future, but this isn't bulletproof since the future can be completed
outside of the lock.
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