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https://issues.apache.org/jira/browse/HADOOP-3182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12587042#action_12587042
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Amareshwari Sriramadasu commented on HADOOP-3182:
-------------------------------------------------

bq. What is the usage of the jobconf property 
"hadoop.job.history.user.location"? Cannot find any other codes using it or any 
description.about it.

You can find description in hadoop-default.xml. 
{noformat}
<property>
  <name>hadoop.job.history.user.location</name>
  <value></value>
  <description> User can specify a location to store the history files of 
  a particular job. If nothing is specified, the logs are stored in 
  output directory. The files are stored in "_logs/history/" in the directory.
  User can stop logging by giving the value "none". 
  </description>
</property>
{noformat}

> JobClient creates submitJobDir with SYSTEM_DIR_PERMISSION ( rwx-wx-wx)
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-3182
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3182
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.16.2
>            Reporter: lohit vijayarenu
>            Assignee: Tsz Wo (Nicholas), SZE
>            Priority: Blocker
>             Fix For: 0.16.3, 0.17.0
>
>         Attachments: 3182_20080408.patch, 3182_20080408_0.16.patch
>
>
> JobClient creates submitJobDir with SYSTEM_DIR_PERMISSION ( rwx-wx-wx ) which 
> causes problem while sharing a cluster.
> Consider the case where userA starts jobtracker/tasktrackers and userB 
> submits a job to this cluster. When userB creates submitJobDir it is created 
> with rwx-wx-wx which cannot be read by tasktracker started by userA

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