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https://issues.apache.org/jira/browse/YARN-6420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15950547#comment-15950547
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Varun Saxena edited comment on YARN-6420 at 3/31/17 8:54 AM:
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So this can only happen if replace labels on node and adding of label is done
parallely from 2 clients.
And the order of events in dispatcher is reversed due to a potential race.
Right?
was (Author: varun_saxena):
So this can only happen if replace labels on node and adding of label is done
parallely from 2 clients.
And the dispatcher order is reversed due to a potential race.
Right?
> RM startup failure due to wrong order of editlog
> ------------------------------------------------
>
> Key: YARN-6420
> URL: https://issues.apache.org/jira/browse/YARN-6420
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Critical
>
> Edit log file for nodelabel written in wrong order if
> {{StoreNewClusterNodeLabels}} addition is delayed and
> {{UpdateNodeToLabelsMappingsEvent}} is added to dispatcher.
> Configure RM admin client thread count to 2
> Add node label to cluster X - Client 1
> Delay event addition to dispatcher
> Replace node label on node1 to X - Client 2
> Make sure {{UpdateNodeToLabelsMappingsEvent}} added to dispatcher first.
> Restart resource manager
> {noformat}
> 2017-03-31 16:20:42,236 | WARN | main-EventThread | Exception handling the
> winning of election | ActiveStandbyElector.java:836
> org.apache.hadoop.ha.ServiceFailedException: RM could not transition to Active
> at
> org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:128)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:832)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:422)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:728)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:600)
> Caused by: org.apache.hadoop.ha.ServiceFailedException: Error when
> transitioning to Active mode
> at
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:331)
> at
> org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:126)
> ... 4 more
> Caused by: org.apache.hadoop.service.ServiceStateException:
> java.io.IOException: Not all labels being replaced contained by known label
> collections, please check, new labels=[1]
> at
> org.apache.hadoop.service.ServiceStateException.convert(ServiceStateException.java:59)
> at
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:204)
> at
> org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:120)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:642)
> at
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startActiveServices(ResourceManager.java:1042)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1083)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1079)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> {noformat}
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