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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1363) Get / Cancel / Renew delegation token api should be non blocking
Date Fri, 28 Feb 2014 04:24:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-1363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13915449#comment-13915449

Zhijie Shen commented on YARN-1363:

We need to think about whether get/cancel/renew operation is idempotent to survive RM fail
over. If it's a big additional change, we should solve it another ticket.

> Get / Cancel / Renew delegation token api should be non blocking
> ----------------------------------------------------------------
>                 Key: YARN-1363
>                 URL: https://issues.apache.org/jira/browse/YARN-1363
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Omkar Vinit Joshi
>            Assignee: Zhijie Shen
>         Attachments: YARN-1363.1.patch, YARN-1363.10.patch, YARN-1363.10.patch, YARN-1363.11.patch,
YARN-1363.2.patch, YARN-1363.3.patch, YARN-1363.4.patch, YARN-1363.5.patch, YARN-1363.6.patch,
YARN-1363.7.patch, YARN-1363.8.patch, YARN-1363.9.patch
> Today GetDelgationToken, CancelDelegationToken and RenewDelegationToken are all blocking
> * As a part of these calls we try to update RMStateStore and that may slow it down.
> * Now as we have limited number of client request handlers we may fill up client handlers

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