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https://issues.apache.org/jira/browse/KAFKA-13753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson updated KAFKA-13753:
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Summary: Log cleaner should retain transaction metadata in index until
corresponding marker is removed (was: Log cleaner should transaction metadata
in index until corresponding marker is removed)
> Log cleaner should retain transaction metadata in index until corresponding
> marker is removed
> ---------------------------------------------------------------------------------------------
>
> Key: KAFKA-13753
> URL: https://issues.apache.org/jira/browse/KAFKA-13753
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
> Priority: Major
>
> Currently the log cleaner will remove aborted transactions from the index as
> soon as it detects that the data from the transaction is gone. It does not
> wait until the corresponding marker has also been removed. Although it is
> extremely unlikely, it seems possible today that a Fetch might fail to return
> the aborted transaction metadata correctly if a log cleaning occurs
> concurrently. This is because the collection of aborted transactions is only
> done after the reading data from the log. It would be safer to preserve the
> aborted transaction metadata in the index until the marker is also removed.
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