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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 Wed, 11 Dec 2013 07:58:08 GMT

    [ https://issues.apache.org/jira/browse/YARN-1363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845165#comment-13845165
] 

Zhijie Shen commented on YARN-1363:
-----------------------------------

8. RMDelegationTokenSecretManager has the cleanup thread to clean the outstanding DT operations
that have been finished, but the results have never been polled by the client, which is possible
if the client crashes.

> 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-1363.2.patch
>
>
> Today GetDelgationToken, CancelDelegationToken and RenewDelegationToken are all blocking
apis.
> * 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
quickly.



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