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Date: Thu, 27 Aug 2009 00:06:59 -0700 (PDT)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-525) ListPathsServlet.java uses static
 SimpleDateFormat that has threading issues
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    [ https://issues.apache.org/jira/browse/HDFS-525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748283#action_12748283 ] 

Suresh Srinivas commented on HDFS-525:
--------------------------------------

I am not sure what you mean by odd pattern. The advantage clearly is to be able to replace the existing SimpleDateFormat with ThreadLocalDateFormat, without having to add all the code related to making a thread local SimpleDateFormat in every place.

> 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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