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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11722) Some Instances of Services using ZKDelegationTokenSecretManager go down when old token cannot be deleted
Date Wed, 18 Mar 2015 00:03:38 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366348#comment-14366348
] 

Hadoop QA commented on HADOOP-11722:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12705201/HADOOP-11722.2.patch
  against trunk revision 968425e.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The following test timeouts occurred in hadoop-common-project/hadoop-common:

org.apache.hadoop.http.TestHttpServerLifecycle

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/5962//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/5962//console

This message is automatically generated.

> Some Instances of Services using ZKDelegationTokenSecretManager go down when old token
cannot be deleted
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-11722
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11722
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>         Attachments: HADOOP-11722.1.patch, HADOOP-11722.2.patch
>
>
> The delete node code in {{ZKDelegationTokenSecretManager}} is as follows :
> {noformat}
>        while(zkClient.checkExists().forPath(nodeRemovePath) != null){
>           zkClient.delete().guaranteed().forPath(nodeRemovePath);
>        }
> {noformat}
> When instances of a Service using {{ZKDelegationTokenSecretManager}} try deleting a node
simutaneously, It is possible that all of them enter into the while loop in which case, all
peers will try to delete the node.. Only 1 will succeed and the rest will throw an exception..
which will bring down the node.
> The Exception is as follows :
> {noformat}
> 2015-03-15 10:24:54,000 ERROR org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
ExpiredTokenRemover thread received unexpected exception
> java.lang.RuntimeException: Could not remove Stored Token ZKDTSMDelegationToken_28
> 	at org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager.removeStoredToken(ZKDelegationTokenSecretManager.java:770)
> 	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_28
> 	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:764)
> 	... 4 more
> {noformat}  



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