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https://issues.apache.org/jira/browse/TAJO-295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13810241#comment-13810241
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Jinho Kim commented on TAJO-295:
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I think there is no side effect because datalocation and fetch url is not
ordered. but i will change it clearly
> ConcurrentModificationException in TaskScheduler
> ------------------------------------------------
>
> Key: TAJO-295
> URL: https://issues.apache.org/jira/browse/TAJO-295
> Project: Tajo
> Issue Type: Bug
> Components: master
> Affects Versions: 0.2-incubating
> Reporter: Jinho Kim
> Assignee: Jinho Kim
> Attachments: TAJO-295.patch
>
>
> TaskSchedulerImpl.java throws ConcurrentModificationException while assigning
> task.
> {code}
> 2013-10-31 14:29:04,411 INFO querymaster.Query (Query.java:handle(447)) -
> Processing q_1383197276362_0001 of type INIT_COMPLETED
> Exception in thread "Thread-23" 2013-10-31 14:29:04,536 INFO event.TaskS
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> at java.util.HashMap$KeyIterator.next(HashMap.java:828)
> at
> org.apache.tajo.master.TaskSchedulerImpl$ScheduledRequests.assignToNonLeafTasks(TaskSchedulerImpl.java:505)
> at
> org.apache.tajo.master.TaskSchedulerImpl.schedule(TaskSchedulerImpl.java:201)
> {code}
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