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https://issues.apache.org/jira/browse/YARN-3893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14618522#comment-14618522
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Bibin A Chundatt commented on YARN-3893:
----------------------------------------

Sorry typo. Both RM active can happen in many cases.

> Both RM in active state when Admin#transitionToActive failure from refeshAll()
> ------------------------------------------------------------------------------
>
>                 Key: YARN-3893
>                 URL: https://issues.apache.org/jira/browse/YARN-3893
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Bibin A Chundatt
>            Assignee: Bibin A Chundatt
>            Priority: Critical
>         Attachments: yarn-site.xml
>
>
> Cases that can cause failure
> # Capacity scheduler xml is wrongly configured in switch
> # Refresh ACL failure due to configuration
> # Refresh User group failure due to configuration
> Capacity failure condition have given logs below
> Continuously both RM will try to be active
> {code}
> 2015-07-07 19:18:25,655 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler:
>  Initialized queue: default: capacity=0.5, absoluteCapacity=0.5, 
> usedResources=<memory:0, vCores:0>, usedCapacity=0.0, 
> absoluteUsedCapacity=0.0, numApps=0, numContainers=0
> 2015-07-07 19:18:25,656 WARN 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService: Exception refresh 
> queues.
> java.io.IOException: Failed to re-init queues
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitialize(CapacityScheduler.java:383)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshQueues(AdminService.java:376)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshAll(AdminService.java:605)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:314)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:126)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:824)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:420)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599)
>         at 
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
> Caused by: java.lang.IllegalArgumentException: Illegal capacity of 0.5 for 
> children of queue root for label=node2
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.setChildQueues(ParentQueue.java:159)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.parseQueue(CapacityScheduler.java:639)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitializeQueues(CapacityScheduler.java:503)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.reinitialize(CapacityScheduler.java:379)
>         ... 8 more
> 2015-07-07 19:18:25,656 WARN 
> org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=dsperf   
> OPERATION=refreshQueues TARGET=AdminService     RESULT=FAILURE  
> DESCRIPTION=Exception refresh queues.   PERMISSIONS=
> 2015-07-07 19:18:25,656 WARN 
> org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=dsperf   
> OPERATION=transitionToActive    TARGET=RMHAProtocolService      
> RESULT=FAILURE  DESCRIPTION=Exception transitioning to active   PERMISSIONS=
> 2015-07-07 19:18:25,656 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:128)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:824)
>         at 
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:420)
>         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.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:126)
>         ... 4 more
> Caused by: org.apache.hadoop.ha.ServiceFailedException: java.io.IOException: 
> Failed to re-init queues
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshAll(AdminService.java:617)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:314)
>         ... 5 more
> {code}
> {code}
> dsperf@host-10-128:/opt/bibin/dsperf/OPENSOURCE_3_0/install/hadoop/resourcemanager/bin>
>  ./yarn rmadmin  -getServiceState rm1
> 15/07/07 19:08:10 WARN util.NativeCodeLoader: Unable to load native-hadoop 
> library for your platform... using builtin-java classes where applicable
> active
> dsperf@host-128:/opt/bibin/dsperf/OPENSOURCE_3_0/install/hadoop/resourcemanager/bin>
>  ./yarn rmadmin  -getServiceState rm2
> 15/07/07 19:08:12 WARN util.NativeCodeLoader: Unable to load native-hadoop 
> library for your platform... using builtin-java classes where applicable
> active
> {code}



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