Matthias J. Sax created KAFKA-5004:
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Summary: poll() timeout not enforced when connecting to 0.10.0
broker
Key: KAFKA-5004
URL: https://issues.apache.org/jira/browse/KAFKA-5004
Project: Kafka
Issue Type: Bug
Components: clients
Reporter: Matthias J. Sax
Fix For: 0.10.2.0
In 0.10.1, heartbeat thread and new poll timeout {{max.poll.interval.ms}} got
introduced via KIP-62. In 0.10.2, we added client-broker backward compatibility.
Now, if a 0.10.2 client connects to a 0.10.0 broker, the broker only understand
the heartbeat timeout but not the poll timeout, while the client is still using
the heartbeat background threat. Thus, the new client config
{{max.poll.interval.ms}} is ignored.
In the worst case, the polling threat might die while the heartbeat thread is
still up. Thus, the broker would not timeout the client and no rebalance would
be triggered while at the same time the client is effectively dead not making
any progress in its assigned partitions.
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