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https://issues.apache.org/jira/browse/HADOOP-13539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434184#comment-15434184
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Xiao Chen commented on HADOOP-13539:
------------------------------------
A sample exception is:
{noformat}
2016-08-23 21:34:50,732 ERROR
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
ExpiredTokenRemover thread received unexpected exception
java.lang.RuntimeException: Could not remove Stored Token
ZKDTSMDelegationToken_3
at
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.removeStoredToken(ZKDelegationTokenSecretManager.java:821)
at
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager.removeExpiredToken(AbstractDelegationTokenSecretManager.java:605)
at
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager.access$400(AbstractDelegationTokenSecretManager.java:54)
at
org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager$ExpiredTokenRemover.run(AbstractDelegationTokenSecretManager.java:656)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.zookeeper.KeeperException$NoNodeException:
KeeperErrorCode = NoNode for /zkdtsm/ZKDTSMRoot/ZKDTSMTokensRoot/DT_3
at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:873)
at
org.apache.curator.framework.imps.DeleteBuilderImpl$5.call(DeleteBuilderImpl.java:238)
at
org.apache.curator.framework.imps.DeleteBuilderImpl$5.call(DeleteBuilderImpl.java:233)
at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107)
at
org.apache.curator.framework.imps.DeleteBuilderImpl.pathInForeground(DeleteBuilderImpl.java:230)
at
org.apache.curator.framework.imps.DeleteBuilderImpl.forPath(DeleteBuilderImpl.java:214)
at
org.apache.curator.framework.imps.DeleteBuilderImpl.forPath(DeleteBuilderImpl.java:41)
at
org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.removeStoredToken(ZKDelegationTokenSecretManager.java:815)
... 4 more
{noformat}
> KMS's zookeeper-based secret manager should be consistent when failed to
> remove node
> ------------------------------------------------------------------------------------
>
> Key: HADOOP-13539
> URL: https://issues.apache.org/jira/browse/HADOOP-13539
> Project: Hadoop Common
> Issue Type: Bug
> Components: kms
> Affects Versions: 2.6.0
> Reporter: Xiao Chen
> Assignee: Xiao Chen
>
> In {{ZKDelegationTokenSecretManager}}, the 2 methods
> {{removeStoredMasterKey}} and {{removeStoredToken}} are very much alike, yet
> handles exception differently. We should not throw RTE if a node cannot be
> removed - error logging is enough.
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