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https://issues.apache.org/jira/browse/MAPREDUCE-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13393510#comment-13393510
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Tsuyoshi OZAWA commented on MAPREDUCE-4343:
-------------------------------------------
Harsh,
I think this problem should be split into 2 tickets as follows:
1. Fix the runtime error of ZKStore by adding default constructor.
2. Add ZK recovery support to the resource manager.
In fact, I've already created the patch for fixing the 1st problem.
Should I attach the file here or on the new 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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