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https://issues.apache.org/jira/browse/YARN-4127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14989060#comment-14989060
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Varun Saxena commented on YARN-4127:
------------------------------------
Thanks [~jianhe] for the review and commit
> RM fail with noAuth error if switched from failover mode to non-failover mode
> ------------------------------------------------------------------------------
>
> Key: YARN-4127
> URL: https://issues.apache.org/jira/browse/YARN-4127
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.7.1
> Reporter: Jian He
> Assignee: Varun Saxena
> Fix For: 2.7.2
>
> Attachments: YARN-4127-branch-2.7.01.patch,
> YARN-4127-branch-2.7.02.patch, YARN-4127.01.patch, YARN-4127.02.patch
>
>
> The scenario is that RM failover was initially enabled, so the zkRootNodeAcl
> is by default set with the *RM ID* in the ACL string
> If RM failover is then switched to be disabled, it cannot load data from ZK
> and fail with noAuth error. After I reset the root node ACL, it again can
> access.
> {code}
> 15/09/08 14:28:34 ERROR resourcemanager.ResourceManager: Failed to
> load/recover state
> org.apache.zookeeper.KeeperException$NoAuthException: KeeperErrorCode = NoAuth
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:113)
> at org.apache.zookeeper.ZooKeeper.multiInternal(ZooKeeper.java:949)
> at org.apache.zookeeper.ZooKeeper.multi(ZooKeeper.java:915)
> at
> org.apache.curator.framework.imps.CuratorTransactionImpl.doOperation(CuratorTransactionImpl.java:159)
> at
> org.apache.curator.framework.imps.CuratorTransactionImpl.access$200(CuratorTransactionImpl.java:44)
> at
> org.apache.curator.framework.imps.CuratorTransactionImpl$2.call(CuratorTransactionImpl.java:129)
> at
> org.apache.curator.framework.imps.CuratorTransactionImpl$2.call(CuratorTransactionImpl.java:125)
> at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107)
> at
> org.apache.curator.framework.imps.CuratorTransactionImpl.commit(CuratorTransactionImpl.java:122)
> at
> org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore$SafeTransaction.commit(ZKRMStateStore.java:1009)
> at
> org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore.safeSetData(ZKRMStateStore.java:985)
> at
> org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore.getAndIncrementEpoch(ZKRMStateStore.java:374)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:579)
> at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startActiveServices(ResourceManager.java:973)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1014)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1010)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1667)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToActive(ResourceManager.java:1010)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1050)
> at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1194)
> {code}
> the problem may be that in non-failover mode, RM doesn't use the *RM-ID* to
> connect with ZK and thus fail with no Auth error.
> We should be able to switch failover on and off with no interruption to the
> user.
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