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https://issues.apache.org/jira/browse/KAFKA-1374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14084047#comment-14084047
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Manikumar Reddy commented on KAFKA-1374:
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In this patch, LogCleaner decompress the compressed messages and writes back
the retained messages in compressed form.
I tested the following scenarios
1. Topic with non-compressed messages
2. Topic with compressed messages
3. Topic with both compressed and non-compressed messages.
> LogCleaner (compaction) does not support compressed topics
> ----------------------------------------------------------
>
> Key: KAFKA-1374
> URL: https://issues.apache.org/jira/browse/KAFKA-1374
> Project: Kafka
> Issue Type: Bug
> Reporter: Joel Koshy
> Assignee: Manikumar Reddy
> Labels: newbie++
> Fix For: 0.8.2
>
> Attachments: KAFKA-1374.patch
>
>
> This is a known issue, but opening a ticket to track.
> If you try to compact a topic that has compressed messages you will run into
> various exceptions - typically because during iteration we advance the
> position based on the decompressed size of the message. I have a bunch of
> stack traces, but it should be straightforward to reproduce.
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