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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1680) availableResources sent to applicationMaster in heartbeat should exclude blacklistedNodes free memory.
Date Thu, 20 Mar 2014 21:39:50 GMT

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

Vinod Kumar Vavilapalli updated YARN-1680:
------------------------------------------

    Issue Type: Sub-task  (was: Bug)
        Parent: YARN-1198

> 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
>    Affects Versions: 2.2.0, 2.3.0
>         Environment: SuSE 11 SP2 + Hadoop-2.3 
>            Reporter: Rohith
>
> 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). 



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