hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Craig Welch (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1680) availableResources sent to applicationMaster in heartbeat should exclude blacklistedNodes free memory.
Date Thu, 02 Oct 2014 21:48:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-1680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14157248#comment-14157248
] 

Craig Welch commented on YARN-1680:
-----------------------------------

[~airbots] thanks for your updated WIP patch - I've not looked at it extensively yet, but
at first glance it looks good to me.  On the original patch I noticed that there seems to
be a facility for blacklisting racks as well as nodes, and I was concerned that that needed
to be addressed as well.  It may be in this patch, but it did not look like it to me.  I do
think it can be without too much difficulty - I think putting the additions (and removals)
into sets and then checking to see if the node's rack is in the set during the node iteration
would do the trick (I may be off here, but that looks like it would work to me.)

> 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
>            Assignee: Chen He
>         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)

Mime
View raw message