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https://issues.apache.org/jira/browse/HADOOP-3937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matei Zaharia updated HADOOP-3937:
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    Status: Patch Available  (was: Open)

> Job history may get disabled due to overly long job names
> ---------------------------------------------------------
>
>                 Key: HADOOP-3937
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3937
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.17.1, 0.17.0, 0.18.0, 0.19.0
>            Reporter: Matei Zaharia
>         Attachments: HADOOP-3937.patch
>
>
> Since Hadoop 0.17, the job history logs include the job's name in the 
> filename. However, this can lead to overly long filenames, because job names 
> may be arbitrarily long. When a filename is too long for the underlying OS, 
> file creation fails and the JobHistory class silently disables history from 
> that point on. This can lead to days of lost history until somebody notices 
> the error in the log.
> Proposed solution: Trim the job name to a reasonable length when selecting a 
> filename for the history file.

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