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https://issues.apache.org/jira/browse/YARN-2010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13994143#comment-13994143
]
Jian He commented on YARN-2010:
-------------------------------
Hi folks, thanks for working on this. I agree that we should not fail RM if app
failed to recover.YARN-2019 seems taking care of this. But in this particular
case, IIUC, the problem is that RM was running in non-secure mode and so
clientTokenMaterKey is null. After RM restarts, RM starts running in secure
mode and expects clientTokenMaterKey non-null and then fails.
In non-workpreserving restart, since the old attempt will be essentially
killed on RM restart, new attempt will be automatically started and it will
have the new clientTokenMaterKey key generated. So we may not need to fail
this app.
In work-preserving restart, because the old AM running before RM
restart(non-secure) was not given the clientToAMMasterKey, even though RM is
now running in secure mode, client without the clientToken should also be able
to talk with the AM? [~vinodkv] is this the case?
> 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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