[ 
https://issues.apache.org/jira/browse/YARN-4041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14972117#comment-14972117
 ] 

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

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2521 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2521/])
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/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java
* hadoop-yarn-project/CHANGES.txt
* 
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/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMRestart.java


> 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.



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

Reply via email to