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Date: Mon, 8 Apr 2013 18:53:18 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: notifications@accumulo.apache.org
Message-ID: <JIRA.12641402.1365440581207.129122.1365447198492@arcas>
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Subject: [jira] [Commented] (ACCUMULO-1252) Race condition in BulkImport
 causes ConcurrentModificationException
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    [ https://issues.apache.org/jira/browse/ACCUMULO-1252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13625661#comment-13625661 ] 

Hudson commented on ACCUMULO-1252:
----------------------------------

Integrated in Accumulo-Trunk-Hadoop-2.0 #181 (See [https://builds.apache.org/job/Accumulo-Trunk-Hadoop-2.0/181/])
    ACCUMULO-1252 remove loaded files outside the threadpool (Revision 1465690)

     Result = SUCCESS
ecn : 
Files : 
* /accumulo/trunk
* /accumulo/trunk/assemble
* /accumulo/trunk/core
* /accumulo/trunk/examples
* /accumulo/trunk/fate/src/main/java/org/apache/accumulo/fate/ZooStore.java
* /accumulo/trunk/fate/src/main/java/org/apache/accumulo/fate/zookeeper/ZooSession.java
* /accumulo/trunk/server
* /accumulo/trunk/server/src/main/java/org/apache/accumulo/server/master/tableOps/BulkImport.java
* /accumulo/trunk/src

                
> Race condition in BulkImport causes ConcurrentModificationException
> -------------------------------------------------------------------
>
>                 Key: ACCUMULO-1252
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1252
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.4.2
>            Reporter: William Slacum
>
> The LoadFiles class gets a synchronized list of files to import and, while iterating over that list, creates another list of Callable's. If the list of files to load is long enough, it's possible that a bulk import on a previous file in the list could finish and remove itself from the master list before all of the commands to import the rest of the files are created. This causes a ConcurrentModificationException when trying to fetch the next file to load.
> I think the concurrent lists support an iterator that will not fail if the underlying list is modified, but if not, I think this can be solved by first creating a list of Callables and then adding them to the thread pool in a separate loop.

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