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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1630) Unbounded waiting for response in YarnClientImpl.java causes thread to hang forever
Date Sun, 26 Jan 2014 18:25:38 GMT

    [ https://issues.apache.org/jira/browse/YARN-1630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13882376#comment-13882376

Sandy Ryza commented on YARN-1630:

There definitely appears to be another bug, but unfortunately we weren't able to find anything
fishy in the RM log and weren't able to reproduce it.  When it comes up again and we can gather
more information, we'll post additional details.

> Unbounded waiting for response in YarnClientImpl.java causes thread to hang forever
> -----------------------------------------------------------------------------------
>                 Key: YARN-1630
>                 URL: https://issues.apache.org/jira/browse/YARN-1630
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 2.2.0
>            Reporter: Aditya Acharya
>            Assignee: Aditya Acharya
>         Attachments: diff.txt
> I ran an MR2 application that would have been long running, and killed it programmatically
using a YarnClient. The app was killed, but the client hung forever. The message that I saw,
which spammed the logs, was "Watiting for application application_1389036507624_0018 to be
> The RM log indicated that the app had indeed transitioned from RUNNING to KILLED, but
for some reason future responses to the RPC to kill the application did not indicate that
the app had been terminated.
> I tracked this down to YarnClientImpl.java, and though I was unable to reproduce the
bug, I wrote a patch to introduce a bound on the number of times that YarnClientImpl retries
the RPC before giving up.

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