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https://issues.apache.org/jira/browse/YARN-6178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15862952#comment-15862952
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Varun Saxena commented on YARN-6178:
------------------------------------
We can make that check for robustness but my concern was that what could lead
to this? And if there is a problem which causes mirror file size to be 0,
probably a fix would be required there.
> RM recovery failure on node label mirror load
> ---------------------------------------------
>
> Key: YARN-6178
> URL: https://issues.apache.org/jira/browse/YARN-6178
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Critical
>
> Node label feature enabled .File state store the mirror file size is zero.
> {noformat}
> secureuser@vm2:/tmp/hadoop-yarn-yarn/node-labels> l
> total 8
> drwxr-xr-x 2 secureuser hadoop 4096 Feb 6 18:56 ./
> drwxr-xr-x 3 secureuser hadoop 4096 Jan 22 22:07 ../
> -rw-r--r-- 1 secureuser hadoop 0 Feb 6 18:56 nodelabel.editlog
> -rw-r--r-- 1 secureuser hadoop 0 Feb 6 18:56 nodelabel.mirror
> {noformat}
> {noformat}
> 2017-02-11 10:04:59,034 INFO org.apache.hadoop.conf.Configuration:
> dynamic-resources.xml not found
> 2017-02-11 10:04:59,042 WARN
> org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=yarn
> OPERATION=transitionToActive TARGET=RM RESULT=FAILURE
> DESCRIPTION=Exception transitioning to active PERMISSIONS=
> 2017-02-11 10:04:59,042 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.ActiveStandbyElectorBasedElectorService.becomeActive(ActiveStandbyElectorBasedElectorService.java:144)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:888)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:467)
> 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:321)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ActiveStandbyElectorBasedElectorService.becomeActive(ActiveStandbyElectorBasedElectorService.java:142)
> ... 4 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.AddToClusterNodeLabelsRequestPBImpl.initLocalNodeLabels(AddToClusterNodeLabelsRequestPBImpl.java:117)
> at
> org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.AddToClusterNodeLabelsRequestPBImpl.getNodeLabels(AddToClusterNodeLabelsRequestPBImpl.java:129)
> at
> org.apache.hadoop.yarn.nodelabels.FileSystemNodeLabelsStore.loadFromMirror(FileSystemNodeLabelsStore.java:169)
> at
> org.apache.hadoop.yarn.nodelabels.FileSystemNodeLabelsStore.recover(FileSystemNodeLabelsStore.java:205)
> at
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager.initNodeLabelStore(CommonNodeLabelsManager.java:251)
> at
> org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager.serviceStart(CommonNodeLabelsManager.java:265)
> at
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
> at
> org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:120)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:761)
> at
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startActiveServices(ResourceManager.java:1139)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1179)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1175)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1892)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToActive(ResourceManager.java:1175)
> at
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:316)
> ... 5 more
> 2017-02-11 10:04:59,042 INFO org.apache.hadoop.ha.ActiveStandbyElector:
> Trying to re-establish ZK session
> {noformat}
> Should skip load if the size is zero.
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