[ https://issues.apache.org/jira/browse/YARN-2010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14011355#comment-14011355 ] 

Jian He commented on YARN-2010:
-------------------------------

bq. The stack trace corresponds to non-work-preserving restart. I am not sure I understand the concern.
What I meant is, in this scenario, it shouldn't matter whether the old attempt has the master key or not, since the old attempt will be anyways killed by NM on RM restart. The newly started attempt will have the proper master key generated. If we just check whether the key is null and move on, the next attempt should be able to succeed. So we don't need to explicitly fail the app ?

> RM can't transition to active if it can't recover an app attempt
> ----------------------------------------------------------------
>
>                 Key: YARN-2010
>                 URL: https://issues.apache.org/jira/browse/YARN-2010
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.3.0
>            Reporter: bc Wong
>            Assignee: Rohith
>            Priority: Critical
>         Attachments: YARN-2010.1.patch, YARN-2010.patch, yarn-2010-2.patch
>
>
> If the RM fails to recover an app attempt, it won't come up. We should make it more resilient.
> Specifically, the underlying error is that the app was submitted before Kerberos security got turned on. Makes sense for the app to fail in this case. But YARN should still start.
> {noformat}
> 2014-04-11 11:56:37,216 WARN org.apache.hadoop.ha.ActiveStandbyElector: Exception handling the winning of election 
> org.apache.hadoop.ha.ServiceFailedException: RM could not transition to Active 
> at org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:118) 
> at org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:804) 
> at org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:415) 
> at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599) 
> at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498) 
> Caused by: org.apache.hadoop.ha.ServiceFailedException: Error when transitioning to Active mode 
> at org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:274) 
> at org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:116) 
> ... 4 more 
> Caused by: org.apache.hadoop.service.ServiceStateException: org.apache.hadoop.yarn.exceptions.YarnException: java.lang.IllegalArgumentException: Missing argument 
> at org.apache.hadoop.service.ServiceStateException.convert(ServiceStateException.java:59) 
> at org.apache.hadoop.service.AbstractService.start(AbstractService.java:204) 
> at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startActiveServices(ResourceManager.java:811) 
> at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToActive(ResourceManager.java:842) 
> at org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:265) 
> ... 5 more 
> Caused by: org.apache.hadoop.yarn.exceptions.YarnException: java.lang.IllegalArgumentException: Missing argument 
> at org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.recoverApplication(RMAppManager.java:372) 
> at org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.submitApplication(RMAppManager.java:273) 
> at org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.recover(RMAppManager.java:406) 
> at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.recover(ResourceManager.java:1000) 
> at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:462) 
> at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) 
> ... 8 more 
> Caused by: java.lang.IllegalArgumentException: Missing argument 
> at javax.crypto.spec.SecretKeySpec.<init>(SecretKeySpec.java:93) 
> at org.apache.hadoop.security.token.SecretManager.createSecretKey(SecretManager.java:188) 
> at org.apache.hadoop.yarn.server.resourcemanager.security.ClientToAMTokenSecretManagerInRM.registerMasterKey(ClientToAMTokenSecretManagerInRM.java:49) 
> at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.recoverAppAttemptCredentials(RMAppAttemptImpl.java:711) 
> at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.recover(RMAppAttemptImpl.java:689) 
> at org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.recover(RMAppImpl.java:663) 
> at org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.recoverApplication(RMAppManager.java:369) 
> ... 13 more 
> {noformat}



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