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Date: Wed, 26 Mar 2008 23:53:24 -0700 (PDT)
From: "Amir Youssefi (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-3103) [HOD] Hadoop.tmp.dir should not be
 set to cluster directory
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    [ https://issues.apache.org/jira/browse/HADOOP-3103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582528#action_12582528 ] 

Amir Youssefi commented on HADOOP-3103:
---------------------------------------

Thanks for confirming the requested priority. Please let  me know if you need more details.

+1 for making the change.


> [HOD] Hadoop.tmp.dir should not be set to cluster directory
> -----------------------------------------------------------
>
>                 Key: HADOOP-3103
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3103
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/hod
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Blocker
>             Fix For: 0.16.2
>
>         Attachments: HADOOP-3103
>
>
> Currently HOD generates  hadoop.tmp.dir pointing to the cluster directory(hod.clusterdir), which users typically create in their home directories. This hadoop.tmp.dir is used on the client side when a jar is run(org/apache/hadoop/util/RunJar.java). The user home directories might be NFS mounted in some environments, which might result in a hit, for example when running a jar.
> So, HOD *should not* generate hadoop.tmp.dir pointing to cluster directory. Instead, it should use hod.temp-dir, which *is* the location that dfs.client.buffer.dir uses to alleviate any such NFS hit problems. Further, though currently hadoop.tmp.dir is not used on hadoop daemons side, it would be good if HOD generates it on daemons side too, and thus preclude any related problems in future.

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