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https://issues.apache.org/jira/browse/YARN-4127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14970343#comment-14970343
 ] 

Hadoop QA commented on YARN-4127:
---------------------------------

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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  17m  8s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to 
include 1 new or modified test files. |
| {color:green}+1{color} | javac |   7m 53s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |  10m 27s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 25s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 51s | There were no new checkstyle 
issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 32s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   1m 29s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |  58m  9s | Tests passed in 
hadoop-yarn-server-resourcemanager. |
| | |  98m 32s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12768191/YARN-4127.02.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 124a412 |
| hadoop-yarn-server-resourcemanager test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/9537/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/9537/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/9537/console |


This message was automatically generated.

> 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
>         Attachments: 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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