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Posted to yarn-issues@hadoop.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2013/02/05 00:58:13 UTC
[jira] [Commented] (YARN-355) RM app submission jams under load
[ https://issues.apache.org/jira/browse/YARN-355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570762#comment-13570762 ]
Siddharth Seth commented on YARN-355:
-------------------------------------
{{NetUtils.isLocalAddress}} doesn't check ports, which would break an unlikely scenario - multiple RMs on the same host, with one RM renewing the other RM's tokens.
Other than that, the patch looks good.
> RM app submission jams under load
> ---------------------------------
>
> Key: YARN-355
> URL: https://issues.apache.org/jira/browse/YARN-355
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 3.0.0, 2.0.0-alpha, 0.23.6
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Blocker
> Attachments: YARN-355.branch-23.patch, YARN-355.patch
>
>
> The RM performs a loopback connection to itself to renew its own tokens. If app submissions consume all RPC handlers for {{ClientRMProtocol}}, then app submissions block because it cannot loopback to itself to do the renewal.
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