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https://issues.apache.org/jira/browse/HDFS-525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748560#action_12748560
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Tsz Wo (Nicholas), SZE commented on HDFS-525:
---------------------------------------------

On a second thought, it is better to revert the patch since it was committed to 
both 0.20 and trunk.

> ListPathsServlet.java uses static SimpleDateFormat that has threading issues
> ----------------------------------------------------------------------------
>
>                 Key: HDFS-525
>                 URL: https://issues.apache.org/jira/browse/HDFS-525
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.20.1, 0.21.0
>
>         Attachments: HDFS-525.1.patch, HDFS-525.2.patch, HDFS-525.patch, 
> HDFS-525.patch, HDFS-525.rel20.patch, HDFS.525-3.patch
>
>
> SimpleDateFormat is not thread safe. Multiple threads accessing the servlet 
> can cause threading issues

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