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https://issues.apache.org/jira/browse/MAPREDUCE-3730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13216038#comment-13216038
 ] 

Hudson commented on MAPREDUCE-3730:
-----------------------------------

Integrated in Hadoop-Mapreduce-trunk-Commit #1785 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/1785/])
    MAPREDUCE-3730. Modified RM to allow restarted NMs to be able to join the 
cluster without waiting for expiry. Contributed by Jason Lowe. (Revision 
1293436)

     Result = ABORTED
vinodkv : 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1293436
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/ResourceTrackerService.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/rmnode/RMNodeEventType.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/rmnode/RMNodeImpl.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/rmnode/RMNodeReconnectEvent.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/CapacityScheduler.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/fifo/FifoScheduler.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/MockNodes.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/TestFifoScheduler.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/TestResourceTrackerService.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/TestCapacityScheduler.java

                
> Allow restarted NM to rejoin cluster before RM expires it
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-3730
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3730
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2, resourcemanager
>    Affects Versions: 0.23.1, 0.24.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Minor
>             Fix For: 0.23.2
>
>         Attachments: MAPREDUCE-3730.patch, MAPREDUCE-3730.patch, 
> MAPREDUCE-3730.patch
>
>
> When a node in the RUNNING state (healthy or unhealthy) is rebooted, the 
> resourcemanager rejects the nodemanager's registration request as a duplicate 
> because it is convinced that the nodemanager is already running on that node. 
>  It won't allow that node to rejoin the cluster until the node expiration 
> time elapses which is 10min+ by default.  We should allow the NM to rejoin 
> the cluster if it re-registers within the expiration timeout.
> Note that this problem occurs with NMs that are configured to specific ports. 
>  If ephemeral ports are used then a NM reboot "works" because the RM thinks 
> the NM registration is for a new node.  See the discussions in MAPREDUCE-3070 
> and MAPREDUCE-3363.

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