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https://issues.apache.org/jira/browse/KAFKA-4246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15542950#comment-15542950
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Vahid Hashemian commented on KAFKA-4246:
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[~nucatus] Could you share part of your code related to this issue?
> Discretionary partition assignment on the consumer side not functional
> ----------------------------------------------------------------------
>
> Key: KAFKA-4246
> URL: https://issues.apache.org/jira/browse/KAFKA-4246
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 0.10.0.1
> Reporter: Alexandru Ionita
>
> Trying to manually assign partition/topics to a consumer will not work
> correctly. The consumer will be able to fetch records from the given
> partitions, but the first commit will fail with the following message:
> {code}
> 2016-10-03 13:44:50.673 DEBUG 11757 --- [pool-9-thread-1]
> o.a.k.c.c.internals.ConsumerCoordinator : Offset commit for group XXXXXX
> failed: The coordinator is not aware of this member.
> 2016-10-03 13:44:50.673 WARN 11757 --- [pool-9-thread-1]
> o.a.k.c.c.internals.ConsumerCoordinator : Auto offset commit failed for
> group XXXXXX: Commit cannot be completed since the group has already
> rebalanced and assigned the partitions to another member. This means that the
> time between subsequent calls to poll() was longer than the configured
> session.timeout.ms, which typically implies that the poll loop is spending
> too much time message processing. You can address this either by increasing
> the session timeout or by reducing the maximum size of batches returned in
> poll() with max.poll.records.
> {code}.
> All this while the consumer will continue to poll records from the kafka
> cluster, but every commit will fail with the same message.
> I tried setting the {{session.timeout.ms}} to values like 50000, but I was
> getting the same outcome => no successfull commits.
> If I only switch from {{consumer.assign( subscribedPartitions )}} to
> {{consumer.subscribe( topics )}}, everything works as expected. No other
> client configurations should be changed to make it work.
> Am I missing something here?
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