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https://issues.apache.org/jira/browse/MAPREDUCE-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy resolved MAPREDUCE-4343.
--------------------------------------

    Resolution: Duplicate

Duplicate of MAPREDUCE-4326.
                
> ZK recovery support for ResourceManager
> ---------------------------------------
>
>                 Key: MAPREDUCE-4343
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4343
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Harsh J
>         Attachments: MR-4343.1.patch
>
>
> MAPREDUCE-279 included bits and pieces of possible ZK integration for YARN's 
> RM, but looks like it failed to complete it (for scalability reasons? etc?) 
> and there seems to be no JIRA tracking this feature that has been already 
> claimed publicly as a good part about YARN.
> If it did complete it, we should document how to use it. Setting the 
> following only yields:
> {code}
> <property>
> <name>yarn.resourcemanager.store.class</name>
> <value>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKStore</value>
> </property>
> <property>
> <name>yarn.resourcemanager.zookeeper-store.address</name>
> <value>test.vm:2181/yarn-recovery-store</value>
> </property>
> {code}
> {code}
> Error starting ResourceManager
> java.lang.RuntimeException: java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKStore.<init>()
> at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:128)
> at 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.StoreFactory.getStore(StoreFactory.java:32)
> at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:621)
> Caused by: java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKStore.<init>()
> at java.lang.Class.getConstructor0(Class.java:2706)
> at java.lang.Class.getDeclaredConstructor(Class.java:1985)
> at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:122)
> ... 2 more
> {code}
> This JIRA is hence filed to track the addition/completion of recovery via ZK.

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