hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2314) ContainerManagementProtocolProxy can create thousands of threads for a large cluster
Date Tue, 14 Oct 2014 19:54:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-2314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14171420#comment-14171420
] 

Jason Lowe commented on YARN-2314:
----------------------------------

Yes, the patch sets the default to off since that allows all cluster sizes to work.  If it's
crucial to default to enabled for small clusters then those with large clusters will have
to manually configure the cache off.  Again I have yet to see evidence this cache is necessary,
so defaulting to something that doesn't fail for all cluster sizes seemed like a better choice
than one which would work for some but not others.  If you have evidence where Tez absolutely
has to have this cache enabled that would be good to share.

> ContainerManagementProtocolProxy can create thousands of threads for a large cluster
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-2314
>                 URL: https://issues.apache.org/jira/browse/YARN-2314
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>         Attachments: YARN-2314.patch, disable-cm-proxy-cache.patch, nmproxycachefix.prototype.patch
>
>
> ContainerManagementProtocolProxy has a cache of NM proxies, and the size of this cache
is configurable.  However the cache can grow far beyond the configured size when running on
a large cluster and blow AM address/container limits.  More details in the first comment.



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

Mime
View raw message