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https://issues.apache.org/jira/browse/MAPREDUCE-3126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125264#comment-13125264
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Hudson commented on MAPREDUCE-3126:
-----------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #1135 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/1135/])
MAPREDUCE-3126. Fixed a corner case in CapacityScheduler where headroom
wasn't updated on changes to cluster size.
acmurthy :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1182000
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacitySchedulerConfiguration.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/LeafQueue.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestApplicationLimits.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestLeafQueue.java
> mr job stuck because reducers using all slots and mapper isn't scheduled
> ------------------------------------------------------------------------
>
> Key: MAPREDUCE-3126
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3126
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Thomas Graves
> Assignee: Arun C Murthy
> Priority: Blocker
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-3126.patch
>
>
> The command in MAPREDUCE-3124 run and this job got hung with 1 Map task
> waiting for resources and 7 Reducers running (2 waiting). The mapper got
> scheduler, then AM scheduled the reducers, the map task failed and tried to
> start a new attempt but reducers were using all the slots.
> I will try to add some more info from the logs.
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