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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1878) Yarn standby RM taking long to transition to active
Date Wed, 26 Mar 2014 04:04:15 GMT

    [ https://issues.apache.org/jira/browse/YARN-1878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947528#comment-13947528
] 

Xuan Gong commented on YARN-1878:
---------------------------------

In ActiveStandbyElector#process, it waits zkSessionTimeout (The default value is 10s) to process
the event. I think this is the reason why it takes so long for standby RM transits to active.
To address this issue, we can simply change the default value to 5s, which is used in HDFS.
Also, we can adjust this config by setting yarn.resourcemanager.zk-timeout-ms in YARN-SITE.XML

> Yarn standby RM taking long to transition to active
> ---------------------------------------------------
>
>                 Key: YARN-1878
>                 URL: https://issues.apache.org/jira/browse/YARN-1878
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.4.0
>            Reporter: Arpit Gupta
>            Assignee: Xuan Gong
>
> In our HA tests we are noticing that some times it can take upto 10s for the standby
RM to transition to active.



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