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https://issues.apache.org/jira/browse/KAFKA-5804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16145467#comment-16145467
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ASF GitHub Bot commented on KAFKA-5804:
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GitHub user dguy opened a pull request:
https://github.com/apache/kafka/pull/3754
KAFKA-5804: retain duplicates in ChangeLoggingWindowBytesStore
`ChangeLoggingWindowBytesStore` needs to have the same `retainDuplicates`
functionality as `RocksDBWindowStore` else data could be lost upon
failover/restoration.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dguy/kafka hotfix-changelog-window-store
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/3754.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 #3754
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commit d63358a67a98d2fbd53ea47f9b7d54c5dd65b937
Author: Damian Guy <[email protected]>
Date: 2017-08-29T15:18:31Z
retain duplicates in ChangeLoggingWindowBytesStore
----
> ChangeLoggingWindowBytesStore needs to retain duplicates when writing to the
> log
> --------------------------------------------------------------------------------
>
> Key: KAFKA-5804
> URL: https://issues.apache.org/jira/browse/KAFKA-5804
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Damian Guy
> Assignee: Damian Guy
> Fix For: 1.0.0
>
>
> The {{ChangeLoggingWindowBytesStore}} needs to have the same duplicate
> retaining logic as {{RocksDBWindowStore}} otherwise data loss may occur when
> performing windowed joins.
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