Lianet Magrans created KAFKA-16985:
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Summary: Ensure consumer sends leave request on close even if
interrupted
Key: KAFKA-16985
URL: https://issues.apache.org/jira/browse/KAFKA-16985
Project: Kafka
Issue Type: Bug
Reporter: Lianet Magrans
Assignee: Lianet Magrans
While running some stress tests we found out consumers were not leaving the
group if interrupted while closing (leading to members getting eventually
fenced after the session expired). On close, the consumer generates an
Unsubscribe event to be handled in the background, but we noticed that the
network thread failed with the interruption, seemingly not sending the unsent
requests. We should review this to ensure that a member does a clean leave,
notifying the coordinator with a leave HB, even if in a fire-and-forget mode in
the case of interruption. (Still under investigation, I'll update more info as
I discover it)
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