[ 
https://issues.apache.org/jira/browse/YARN-4101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14728405#comment-14728405
 ] 

Hudson commented on YARN-4101:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #338 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/338/])
YARN-4101. RM should print alert messages if Zookeeper and Resourcemanager gets 
connection issue. Contributed by Xuan Gong (jianhe: rev 
09c64ba1ba8be7a2ac31f4e42efb8c99b682399f)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServices.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/EmbeddedElectorService.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/AdminService.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/webapp/RMWebAppFilter.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMWebApp.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ClusterInfo.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/AboutBlock.java
* 
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ha/ActiveStandbyElector.java


> RM should print alert messages if Zookeeper and Resourcemanager gets 
> connection issue
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-4101
>                 URL: https://issues.apache.org/jira/browse/YARN-4101
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Yesha Vora
>            Assignee: Xuan Gong
>            Priority: Critical
>             Fix For: 2.8.0, 2.7.2, 2.6.2
>
>         Attachments: YARN-4101.1.patch, YARN-4101.2.patch, YARN-4101.3.patch
>
>
> Currently, There is no way for user to understand Zk-RM has connection 
> issues. In HA environment, RM is highly dependent on Zookeeper. If connection 
> between RM and Zk is jeopardized, cluster is likely to be gone in bad state.
> Example: Rm1 is active and Rm2 is standby. If connection between Rm2 and Zk 
> is lost, Rm2 will never become active. In this case, if Rm1 hits an error and 
> could not be started, cluster goes in bad state. This situation is very hard 
> to debug for user. In this case, if we can develop better prompting of 
> messages, User could fix the Zk-RM connection issue and could avoid getting 
> in bad state.
> Thus, We need a better way to prompt alert to user if connection between Zk 
> -> Active RM or Zk -> standby RM is getting bad.
> Here are the suggestions.
> 1) Print connection lost alert in RM UI
> 2) Print alert messages while running any Yarn command such as yarn logs, 
> yarn applications etc



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

Reply via email to