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https://issues.apache.org/jira/browse/MAPREDUCE-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13396611#comment-13396611
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Harsh J commented on MAPREDUCE-4343:
------------------------------------
Thanks Sharad and Arun. I missed out MAPREDUCE-2713 in my search (apparently
missed searching for 'recover' (instead searched for availability)). Sorry for
the noise.
Thanks much for the immediate patch Tsuyoshi. It may be considered now in
MAPREDUCE-4326 unless the whole thing is being revamped.
> 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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