[jira] Commented: (HADOOP-4060) [HOD] Make HOD to roll log files on the client

["Hemanth Yamijala (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628427#action_12628427 ] 

Hemanth Yamijala commented on HADOOP-4060:
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One minor comment. Since the new config option is publicly visible in hod --help, it should be given a fixed small option in the help, like the other options. Currently, we are automatically assigning a free character to it, and it is always coming as -g, but this is not required, for e.g. if we add new options.

Otherwise +1 for the patch.

> [HOD] Make HOD to roll log files on the client 
> -----------------------------------------------
>
>                 Key: HADOOP-4060
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4060
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/hod
>            Reporter: Hemanth Yamijala
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Blocker
>             Fix For: 0.18.1, 0.19.0
>
>         Attachments: HOD-LOG-ROTATION.txt
>
>
> Currently HOD writes a log file on the client in the cluster directory, named hod-<username>.log. This file is appended to for each run of hod allocation that runs on the same cluster directory. Thus, the file can become quite large - particularly if the job is queued for a long time. If there are problems with the HOD client subsequently, this could result in stale file handles pointing to this large file, and cause disk space to fill up. Another problem is that a large log file is usually unusable for a user.

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