[jira] [Commented] (YARN-8464) Application does not get to Running state even with available resources on node managers when async scheduling is enabled

2018-06-26 Thread Wangda Tan (JIRA) 


[ 
https://issues.apache.org/jira/browse/YARN-8464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16524309#comment-16524309
 ] 

Wangda Tan commented on YARN-8464:
--

[~sunilg], mind to update the desc/title to the root cause?

{code}
526 // we can return from here itself.
527 if(nodes.size() == 0) {
528   return;
529 }
530 int start = random.nextInt(nodes.size());
{code}

The second node.size() will cause issue if race condition happens, Instead, you 
should cache the first one.

> Application does not get to Running state even with available resources on 
> node managers when async scheduling is enabled
> -
>
> Key: YARN-8464
> URL: https://issues.apache.org/jira/browse/YARN-8464
> Project: Hadoop YARN
>  Issue Type: Bug
>  Components: capacity scheduler
>Reporter: Charan Hebri
>Assignee: Sunil Govindan
>Priority: Critical
> Attachments: YARN-8464.001.patch
>
>
> Test scenario:
> 1. Make either yarn.nodemanager.log-dirs/yarn.nodemanager.local-dirs read-only
> 2. Restart NMs via Ambari, none of them show up in the RM UI as expected
> 3. Revert back the read-only dirs and restart NMs
> 4. Include a non-existent dir in either 
> yarn.nodemanager.log-dirs/yarn.nodemanager.local-dirs (1 good existing dir + 
> 1 non-existing dir)
> 5. Restart NMs via Ambari, all NMs show as RUNNING with a Health Report 
> message as expected
> 6. Submit a MapReduce sleep job, job goes into ACCEPTED state
> 7. Job stays in ACCEPTED state forever even though all NMs are running and 
> have available memory
>  
> Credits to [~charanh] who found this issue.



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[jira] [Commented] (YARN-8464) Application does not get to Running state even with available resources on node managers when async scheduling is enabled

2018-06-26 Thread Sunil Govindan (JIRA) 


[ 
https://issues.apache.org/jira/browse/YARN-8464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16524308#comment-16524308
 ] 

Sunil Govindan commented on YARN-8464:
--

Thanks [~leftnoteasy] for helping in debugging same.

Attaching an initial patch. pls help to review.

> Application does not get to Running state even with available resources on 
> node managers when async scheduling is enabled
> -
>
> Key: YARN-8464
> URL: https://issues.apache.org/jira/browse/YARN-8464
> Project: Hadoop YARN
>  Issue Type: Bug
>  Components: capacity scheduler
>Reporter: Charan Hebri
>Assignee: Sunil Govindan
>Priority: Critical
> Attachments: YARN-8464.001.patch
>
>
> Test scenario:
> 1. Make either yarn.nodemanager.log-dirs/yarn.nodemanager.local-dirs read-only
> 2. Restart NMs via Ambari, none of them show up in the RM UI as expected
> 3. Revert back the read-only dirs and restart NMs
> 4. Include a non-existent dir in either 
> yarn.nodemanager.log-dirs/yarn.nodemanager.local-dirs (1 good existing dir + 
> 1 non-existing dir)
> 5. Restart NMs via Ambari, all NMs show as RUNNING with a Health Report 
> message as expected
> 6. Submit a MapReduce sleep job, job goes into ACCEPTED state
> 7. Job stays in ACCEPTED state forever even though all NMs are running and 
> have available memory
>  
> Credits to [~charanh] who found this issue.



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