GitHub user becketqin opened a pull request:
https://github.com/apache/kafka/pull/221
KAFKA-2555: Infinite recursive function call when call commitSync in â¦
@hachikuji @ewencp I found this problem when adding new consumer to mirror
maker which commits offset in the rebalance callback. It is not clear to me why
we are triggering rebalance for commitSync() and fetchCommittedOffset(). Can
you help review to see if I miss something?
Regarding commitSync, After each poll() the partitions will be either
assigned to a consumer or it will be already revoked. As long as user is using
internal offset map, the offset map will always be valid. i.e. the offset map
will always only contain the assigned partitions when commitSync is called.
Hence there is no need to trigger a rebalance in commitSync().
The same guarantee also apply to fetchCommittedOffset(), isn't the only
requirement is to ensure we know the coordinator?
Another related issue is that today the IllegalGenerationIdException is a
bit confusing. When we receive an IllegalGenerationIdException from heartbeat,
we need to use that same generation Id to commit offset and the coordinator
will take it. So the generation ID was not really illegal. I will file a ticket
for this issue.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/becketqin/kafka KAFKA-2555
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/221.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #221
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commit 77b6a59eb926bf99773e7b53bf0e4b1610dc8277
Author: Jiangjie Qin <becket....@gmail.com>
Date: 2015-09-18T17:21:27Z
KAFKA-2555: Infinite recursive function call when call commitSync in
RebalanceListener.onPartitionRevoked()
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