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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4041) Slow delegation token renewal can severely prolong RM recovery
Date Sat, 24 Oct 2015 01:27:28 GMT

    [ https://issues.apache.org/jira/browse/YARN-4041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14972242#comment-14972242
] 

Hudson commented on YARN-4041:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk #2467 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/2467/])
YARN-4041. Slow delegation token renewal can severely prolong RM (jlowe: rev d3a34a4f388155f6a7ef040e244ce7be788cd28b)
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/RMAppImpl.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java
* hadoop-yarn-project/CHANGES.txt


> Slow delegation token renewal can severely prolong RM recovery
> --------------------------------------------------------------
>
>                 Key: YARN-4041
>                 URL: https://issues.apache.org/jira/browse/YARN-4041
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Sunil G
>             Fix For: 2.7.2
>
>         Attachments: 0001-YARN-4041.patch, 0002-YARN-4041.patch, 0003-YARN-4041.patch,
0004-YARN-4041.patch, 0005-YARN-4041.patch
>
>
> When the RM does a work-preserving restart it synchronously tries to renew delegation
tokens for every active application.  If a token server happens to be down or is running slow
and a lot of the active apps were using tokens from that server then it can have a huge impact
on the time it takes the RM to process the restart.



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