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https://issues.apache.org/jira/browse/MAPREDUCE-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13393569#comment-13393569
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Tsuyoshi OZAWA commented on MAPREDUCE-4343:
-------------------------------------------
s/course/coarse/
> 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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