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https://issues.apache.org/jira/browse/KAFKA-1590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14151785#comment-14151785
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Jay Kreps commented on KAFKA-1590:
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Hmm, I think this is going to be a bit confusing. People won't understand what
the log is when they encounter it and won't be able to read it. I see the value
in being able to cut down on I/O but my recommendation would be that we not
enable this by default and that we include a command line utility to pretty
print one of these binary logs.
Also what is the % savings between the current trace level logging and the
proposed binary format?
> Binarize trace level request logging along with debug level text logging
> ------------------------------------------------------------------------
>
> Key: KAFKA-1590
> URL: https://issues.apache.org/jira/browse/KAFKA-1590
> Project: Kafka
> Issue Type: Bug
> Reporter: Guozhang Wang
> Assignee: Abhishek Sharma
> Labels: newbie
> Fix For: 0.9.0
>
> Attachments: Jira-1590-Log4j Binary Appender.patch
>
>
> With trace level logging, the request handling logs can grow very fast
> depending on the client behavior (e.g. consumer with 0 maxWait and hence keep
> sending fetch requests). Previously we have changed it to debug level which
> only provides a summary of the requests, omitting request details. However
> this does not work perfectly since summaries are not sufficient for
> trouble-shooting, and turning on trace level upon issues will be too late.
> The proposed solution here, is to default to debug level logging with trace
> level logging printed as binary format at the same time. The generated binary
> files can then be further compressed / rolled out. When needed, we will then
> decompress / parse the trace logs into texts.
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