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https://issues.apache.org/jira/browse/HADOOP-13500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Lowe reopened HADOOP-13500:
---------------------------------
This is not a duplicate of HADOOP-13556. That JIRA only changed the
getPropsWithPrefix method which was not involved in the error reported by this
JIRA or TEZ-3413. AFAICT iterating a shared configuration object is still
unsafe.
> Concurrency issues when using Configuration iterator
> ----------------------------------------------------
>
> Key: HADOOP-13500
> URL: https://issues.apache.org/jira/browse/HADOOP-13500
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Reporter: Jason Lowe
> Assignee: Ajay Kumar
> Priority: Major
>
> It is possible to encounter a ConcurrentModificationException while trying to
> iterate a Configuration object. The iterator method tries to walk the
> underlying Property object without proper synchronization, so another thread
> simultaneously calling the set method can trigger it.
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