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https://issues.apache.org/jira/browse/HADOOP-5834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711489#action_12711489
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Owen O'Malley commented on HADOOP-5834:
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Would adding a log4j logger than was only used for these events work for you?
That is certainly something I'd be interested in seeing. Because these event
logs are used for JobTracker restart, I don't think making it pluggable is a
good plan.
> Job History log file format is not friendly for external tools.
> ---------------------------------------------------------------
>
> Key: HADOOP-5834
> URL: https://issues.apache.org/jira/browse/HADOOP-5834
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Owen O'Malley
>
> Currently, parsing the job history logs with external tools is very difficult
> because of the format. The most critical problem is that newlines aren't
> escaped in the strings. That makes using tools like grep, sed, and awk very
> tricky.
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