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https://issues.apache.org/jira/browse/KAFKA-2589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15133674#comment-15133674
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ASF GitHub Bot commented on KAFKA-2589:
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GitHub user granthenke opened a pull request:
https://github.com/apache/kafka/pull/876
KAFKA-2589: the default value for the "rebalance.backoff.ms" property…
… is not specified correctly
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/granthenke/kafka rebalance-doc
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/876.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 #876
----
commit 746a3cc88b05cc26e727b66ae808148066a07f1f
Author: Grant Henke <granthe...@gmail.com>
Date: 2016-02-05T05:09:09Z
KAFKA-2589: the default value for the "rebalance.backoff.ms" property is
not specified correctly
----
> Documentation bug: the default value for the "rebalance.backoff.ms" property
> is not specified correctly
> -------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-2589
> URL: https://issues.apache.org/jira/browse/KAFKA-2589
> Project: Kafka
> Issue Type: Bug
> Components: config
> Affects Versions: 0.8.2.1
> Environment: any
> Reporter: Bogdan Dimitriu
> Assignee: Grant Henke
>
> The documentation for 0.8.2.1 consumer properties specifies:
> | rebalance.backoff.ms | 2000 | Backoff time between retries during rebalance
> |
> According to the source code though the default value is obtained this way:
> {code}
> val rebalanceBackoffMs = props.getInt("rebalance.backoff.ms", zkSyncTimeMs)
> {code}
> which is referenced from here:
> {code}
> val zkSyncTimeMs = props.getInt("zookeeper.sync.time.ms", 2000)
> {code}
> So by default it is 2000 as specified in the documentation, UNLESS the
> {{zookeeper.sync.time.ms}} is manually set to be different
> This may create confusion with recommendations such:
> {quote}
> In the case, make sure that rebalance.max.retries * rebalance.backoff.ms >
> zookeeper.session.timeout.ms
> {quote}
> from here:
> https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-Whyaretheremanyrebalancesinmyconsumerlog?
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