[jira] Updated: (HADOOP-3937) Job history may get disabled due to overly long job names

["Matei Zaharia (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-3937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matei Zaharia updated HADOOP-3937:
----------------------------------

    Attachment: HADOOP-3937.patch

Here's a patch that truncates the job's name in the filename (but not the job history file) to 50 characters.

> 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: 0.17.0, 0.17.1, 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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