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https://issues.apache.org/jira/browse/MAPREDUCE-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13393514#comment-13393514
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Harsh J commented on MAPREDUCE-4343:
------------------------------------
Hi,
With (1) done in your local build, are you able to successfully validate that
(2) is possible today already? In case it is (that the RM recovers its state
properly, once ZKStore is fixed), we can just do (1) here and add some docs on
how to use ZKStore (the configs) and resolve the ticket.
> 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
>
> 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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