[jira] [Created] (KAFKA-4298) LogCleaner does not convert compressed message sets properly

["Jason Gustafson (JIRA)" <ji...@apache.org>]

Jason Gustafson created KAFKA-4298:
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             Summary: LogCleaner does not convert compressed message sets properly
                 Key: KAFKA-4298
                 URL: https://issues.apache.org/jira/browse/KAFKA-4298
             Project: Kafka
          Issue Type: Bug
            Reporter: Jason Gustafson
            Assignee: Jason Gustafson
            Priority: Critical
             Fix For: 0.10.1.1


When cleaning the log, we attempt to write the cleaned messages using the message format configured for the topic, but as far as I can tell, we do not convert the wrapped messages in compressed message sets. For example, if there is an old compressed message set with magic=0 in the log and the topic is configured for magic=1, then after cleaning, the new message set will have a wrapper with magic=1, but the nested messages will still have magic=0. If this happens, there does not seem to be an easy way to recover with manually fixing up the log.



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