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https://issues.apache.org/jira/browse/HADOOP-2403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12621741#action_12621741
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Hemanth Yamijala commented on HADOOP-2403:
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bq. We also need to make sure that the characters that are used as delimiter
(., ", tab) should not occur in a value
I guess what you mean is that they must be escaped. This is similar to what
Amarsri has done, but is asking that the escaping be done for all characters
that have significance in job history. +1 for that.
> JobHistory log files contain data that cannot be parsed by
> org.apache.hadoop.mapred.JobHistory
> ----------------------------------------------------------------------------------------------
>
> Key: HADOOP-2403
> URL: https://issues.apache.org/jira/browse/HADOOP-2403
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Runping Qi
> Assignee: Amareshwari Sriramadasu
> Priority: Critical
> Fix For: 0.19.0
>
> Attachments: EncodeDecode.java, patch-2403.txt
>
>
> When some tasks failed, the job tracker writes an line to the history file
> with error message.
> However, the error message may mess up with the history file format, choking
> the history parser. Here is an example:
> MapAttempt TASK_TYPE="MAP" TASKID="tip_200712102254_0001_m_000090"
> TASK_ATTEMPT_ID="task_200712102254_0001_m_000090_0" TASK_STATUS="FAILED"
> FINISH_TIME="1197327293253" HOSTNAME="XXXX:50050"
> ERROR="java.lang.IllegalArgumentException: Trouble to get key or value (<,>
> substituted by null
> . Key XML-Ori:
> <Root>
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