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https://issues.apache.org/jira/browse/MAPREDUCE-157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746284#action_12746284
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Doug Cutting commented on MAPREDUCE-157:
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A hint, run 'ant schemata' then look at
build/src/org/apache/hadoop/mapreduce/jobhistory/Events.java to see the Java
API that's generated.
> Job History log file format is not friendly for external tools.
> ---------------------------------------------------------------
>
> Key: MAPREDUCE-157
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-157
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Reporter: Owen O'Malley
> Assignee: Jothi Padmanabhan
> Attachments: mapred-157-prelim.patch, MAPREDUCE-157-avro.patch
>
>
> 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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