[ 
https://issues.apache.org/jira/browse/YARN-1680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Wangda Tan updated YARN-1680:
-----------------------------
    Assignee:     (was: Tan, Wangda)

> availableResources sent to applicationMaster in heartbeat should exclude 
> blacklistedNodes free memory.
> ------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-1680
>                 URL: https://issues.apache.org/jira/browse/YARN-1680
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>    Affects Versions: 2.2.0, 2.3.0
>         Environment: SuSE 11 SP2 + Hadoop-2.3 
>            Reporter: Rohith Sharma K S
>         Attachments: YARN-1680-WIP.patch, YARN-1680-v2.patch, 
> YARN-1680-v2.patch, YARN-1680.patch
>
>
> There are 4 NodeManagers with 8GB each.Total cluster capacity is 32GB.Cluster 
> slow start is set to 1.
> Job is running reducer task occupied 29GB of cluster.One NodeManager(NM-4) is 
> become unstable(3 Map got killed), MRAppMaster blacklisted unstable 
> NodeManager(NM-4). All reducer task are running in cluster now.
> MRAppMaster does not preempt the reducers because for Reducer preemption 
> calculation, headRoom is considering blacklisted nodes memory. This makes 
> jobs to hang forever(ResourceManager does not assing any new containers on 
> blacklisted nodes but returns availableResouce considers cluster free 
> memory). 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Reply via email to