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https://issues.apache.org/jira/browse/HADOOP-16763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16997761#comment-16997761
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Íñigo Goiri commented on HADOOP-16763:
--------------------------------------
I tested after HADOOP-16765 got merge and I get:
{code}
org.apache.hadoop.ha.ServiceFailedException: RM could not transition to Active
...
Caused by: org.apache.zookeeper.KeeperException$UnimplementedException:
KeeperErrorCode = Unimplemented for /rmstore
at org.apache.zookeeper.KeeperException.create(KeeperException.java:106)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:1637)
at
org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1180)
at
org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1156)
at
org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:64)
at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:100)
at
org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:1153)
at
org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:607)
at
org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:597)
at
org.apache.curator.framework.imps.CreateBuilderImpl$3.forPath(CreateBuilderImpl.java:362)
at
org.apache.curator.framework.imps.CreateBuilderImpl$3.forPath(CreateBuilderImpl.java:310)
at
org.apache.hadoop.util.curator.ZKCuratorManager.create(ZKCuratorManager.java:286)
at
org.apache.hadoop.util.curator.ZKCuratorManager.createRootDirRecursively(ZKCuratorManager.java:319)
at
org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore.startInternal(ZKRMStateStore.java:391)
at
org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.serviceStart(RMStateStore.java:825)
at
org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
... 15 more
{code}
This message is slightly different but still does not work.
If there is no solution for this, we need to document clearly that upgrading to
Hadoop 3.3+ requires an installation of ZooKeeper 3.5+.
> Make Curator 4 run in soft-compatibility mode with ZooKeeper 3.4
> ----------------------------------------------------------------
>
> Key: HADOOP-16763
> URL: https://issues.apache.org/jira/browse/HADOOP-16763
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Íñigo Goiri
> Priority: Major
>
> HADOOP-16579 changed Curator to 4.2 and ZooKeeper to 3.5.
> This change relate to the client libraries used by the components.
> However, the ensemble in most deployments is 3.4 (default in Ubuntu for
> example).
> To allow this mode, there is a soft-compatibility mode described in
> http://curator.apache.org/zk-compatibility.html
> We should enable this soft-compatibility mode.
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