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From "Raju Bairishetti (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3644) Node manager shuts down if unable to connect with RM
Date Fri, 12 Jun 2015 03:58:02 GMT

    [ https://issues.apache.org/jira/browse/YARN-3644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582898#comment-14582898
] 

Raju Bairishetti commented on YARN-3644:
----------------------------------------

Could anyone please review the patch?

> Node manager shuts down if unable to connect with RM
> ----------------------------------------------------
>
>                 Key: YARN-3644
>                 URL: https://issues.apache.org/jira/browse/YARN-3644
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>            Reporter: Srikanth Sundarrajan
>            Assignee: Raju Bairishetti
>         Attachments: YARN-3644.001.patch, YARN-3644.patch
>
>
> When NM is unable to connect to RM, NM shuts itself down.
> {code}
>           } catch (ConnectException e) {
>             //catch and throw the exception if tried MAX wait time to connect RM
>             dispatcher.getEventHandler().handle(
>                 new NodeManagerEvent(NodeManagerEventType.SHUTDOWN));
>             throw new YarnRuntimeException(e);
> {code}
> In large clusters, if RM is down for maintenance for longer period, all the NMs shuts
themselves down, requiring additional work to bring up the NMs.
> Setting the yarn.resourcemanager.connect.wait-ms to -1 has other side effects, where
non connection failures are being retried infinitely by all YarnClients (via RMProxy).



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