Jason Gustafson created KAFKA-3659:
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Summary: Consumer handle coordinator connection blackout period
Key: KAFKA-3659
URL: https://issues.apache.org/jira/browse/KAFKA-3659
Project: Kafka
Issue Type: Bug
Components: consumer
Affects Versions: 0.9.0.1, 0.9.0.0
Reporter: Jason Gustafson
Assignee: Jason Gustafson
Currently when the connection to the coordinator is closed, the consumer will
immediately try to rediscover the coordinator and reconnect to it. This is fine
as it is, but the NetworkClient enforces a blackout period before it will allow
the reconnect to be attempted. This causes the following cycle which continues
in a fairly tight loop until the blackout period has completed:
1. Notice connection failure (i.e. DISCONNECTED state in ConnectionStates)
2. Send GroupCoordinator request to rediscover coordinator.
3. Attempt to connect to coordinator.
4. Go back to 1.
To fix this, we should avoid rediscovery while the connection is blacked out.
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