[HOD] Hadoop.tmp.dir should not be set to cluster directory
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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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