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Date: Fri, 20 May 2016 10:10:12 +0000 (UTC)
From: "hongbin ma (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.12970984.1463623197000.247105.1463739012883@Atlassian.JIRA>
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Subject: [jira] [Updated] (HADOOP-13179) ToolRunner is not thread-safe
 because commons-cli OptionBuilder is not thread-safe
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archived-at: Fri, 20 May 2016 10:10:14 -0000


     [ https://issues.apache.org/jira/browse/HADOOP-13179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

hongbin ma updated HADOOP-13179:
--------------------------------
    Attachment: HADOOP-13179.001.patch

> ToolRunner is not thread-safe because commons-cli OptionBuilder is not thread-safe
> ----------------------------------------------------------------------------------
>
>                 Key: HADOOP-13179
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13179
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: hongbin ma
>            Assignee: hongbin ma
>            Priority: Minor
>         Attachments: HADOOP-13179-master.patch, HADOOP-13179.001.patch
>
>
> I'm running into similar issues like http://stackoverflow.com/questions/22462665/is-hadoops-toorunner-thread-safe, the author's observation seem to make sense to me. However when I checked the hadoop github trunk I found the issue still not fixed.
> Chris Nauroth further investigated this issue, here's his quote: 
> {quote}
> The root cause is that commons-cli OptionBuilder is not thread-safe.
> https://commons.apache.org/proper/commons-cli/apidocs/org/apache/commons/cl
> i/OptionBuilder.html
> According to this issue, commons-cli doesn't plan to change that and
> instead chose to document the lack of thread-safety.
> https://issues.apache.org/jira/browse/CLI-209
> I think we can solve this in Hadoop, probably with a one-line change to
> make GenericOptionsParser#buildGeneralOptions a synchronized method.
> {quote}
> I'll soon upload a patch for this


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