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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3103) [HOD] Hadoop.tmp.dir should not be set to cluster directory
Date Thu, 27 Mar 2008 05:49:29 GMT
[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


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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