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https://issues.apache.org/jira/browse/YARN-4847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205722#comment-15205722
 ] 

Yi Zhou commented on YARN-4847:
-------------------------------

Hi,
The created node labels disappear after restart resource manager(i have a node 
label 'y'). It is a bug or limitation for node label feature ?
{code}
2016-03-22 11:31:28,936 FATAL 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error starting 
ResourceManager
org.apache.hadoop.service.ServiceStateException: java.io.IOException: 
NodeLabelManager doesn't include label = y, please check.
        at 
org.apache.hadoop.service.ServiceStateException.convert(ServiceStateException.java:59)
        at 
org.apache.hadoop.service.AbstractService.init(AbstractService.java:172)
        at 
org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
        at 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceInit(ResourceManager.java:569)
        at 
org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
        at 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.createAndInitActiveServices(ResourceManager.java:1000)
        at 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:262)
        at 
org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
        at 
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1221)
Caused by: java.io.IOException: NodeLabelManager doesn't include label = y, 
please check.
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerUtils.checkIfLabelInClusterNodeLabels(SchedulerUtils.java:287)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.AbstractCSQueue.<init>(AbstractCSQueue.java:106)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.<init>(LeafQueue.java:120)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.parseQueue(CapacityScheduler.java:569)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.parseQueue(CapacityScheduler.java:589)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.initializeQueues(CapacityScheduler.java:464)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.initScheduler(CapacityScheduler.java:296)
        at 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.serviceInit(CapacityScheduler.java:326)
        at 
org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
        ... 7 more
{code}

Thanks

> Add documentation for the Node Label features supported in 2.6 
> ---------------------------------------------------------------
>
>                 Key: YARN-4847
>                 URL: https://issues.apache.org/jira/browse/YARN-4847
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api, client, resourcemanager
>    Affects Versions: 2.6.4
>            Reporter: Naganarasimha G R
>            Assignee: Naganarasimha G R
>
> We constantly face issue with what are the node label supported features in 
> 2.6 and general commands to use it. So it would be better to have 
> documentation capturing what all is supported as part of 2.6



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