[jira] [Assigned] (KAFKA-1581) Log cleaner should have an option to ignore messages without keys

["Manikumar Reddy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-1581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Manikumar Reddy reassigned KAFKA-1581:
--------------------------------------

    Assignee: Manikumar Reddy

> Log cleaner should have an option to ignore messages without keys
> -----------------------------------------------------------------
>
>                 Key: KAFKA-1581
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1581
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Joel Koshy
>            Assignee: Manikumar Reddy
>
> Right now, there is a strict requirement that compacted topics contain only messages with keys. This makes sense, but the issue with a hard requirement is that if it fails the cleaner quits. We should probably allow ignoring these messages (with a warning). Alternatively, we can catch this scenario (instead of the hard requirement) and just skip compaction for that partition.
> This came up because I saw an invalid message (compressed and without a key) in the offsets topic which broke both log compaction and the offset load process. I filed KAFKA-1580 to prevent that from happening in the first place but KAFKA-1580 is only for internal topics. In the general case (compacted non-internal topics) we would not want the cleaners to exit permanently due to an invalid (key-less) message in one of the partitions since that would prevent compaction for other partitions as well.



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