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https://issues.apache.org/jira/browse/MAPREDUCE-1740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13233836#comment-13233836
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Hudson commented on MAPREDUCE-1740:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk #1025 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1025/])
MAPREDUCE-1740. NPE in getMatchingLevelForNodes when node locations are
variable depth (ahmed via tucu) (Revision 1303076)
Result = SUCCESS
tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1303076
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/src/java/org/apache/hadoop/mapred/JobInProgress.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/src/test/mapred/org/apache/hadoop/mapred/TestJobInProgress.java
> NPE in getMatchingLevelForNodes when node locations are variable depth
> ----------------------------------------------------------------------
>
> Key: MAPREDUCE-1740
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1740
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Affects Versions: 0.20.3
> Reporter: Todd Lipcon
> Assignee: Ahmed Radwan
> Attachments: MAPREDUCE-1740.patch, MAPREDUCE-1740_branch-1.0.patch,
> MAPREDUCE-1740_trunk.patch, mapreduce-1740.txt
>
>
> In getMatchingLevelForNodes, we assume that both nodes have the same "depth"
> (ie number of path components). If the user provides a topology script that
> assigns one node a path like /foo/bar/baz and another node a path like
> /foo/blah, this function will throw an NPE.
> I'm not sure if there are other places where we assume that all node
> locations have a constant number of paths. If so we should check the output
> of the topology script aggressively to be sure this is the case. Otherwise I
> think we simply need to add && n2 != null to the while loop
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