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From "Tsuyoshi OZAWA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2091) Add ContainerExitStatus.KILL_EXCEEDED_MEMORY and pass it to app masters
Date Mon, 02 Jun 2014 23:05:02 GMT

    [ https://issues.apache.org/jira/browse/YARN-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14016019#comment-14016019

Tsuyoshi OZAWA commented on YARN-2091:

[~bikassaha], thank you for the comments.

 Should we check if the exitCode has already been set (eg. via a kill event) and if its not
set then set it from exitEvent? How can we check if the exitCode has not been set? Maybe have
some uninitialized/invalid default value.

IIUC, we can distinguish its set value from default value by checking whether exitCode is
ContainerExitStatus.INVALID because default value of {{exitCode}} is ContainerExitStatus.INVALID.
Do you have any comment about this?
  if (container.exitCode == ContainerExitStatus.INVALID) {
    container.exitCode = exitEvent.getExitCode();

About the new exit status, I'll update comments in the next patch.

> Add ContainerExitStatus.KILL_EXCEEDED_MEMORY and pass it to app masters
> -----------------------------------------------------------------------
>                 Key: YARN-2091
>                 URL: https://issues.apache.org/jira/browse/YARN-2091
>             Project: Hadoop YARN
>          Issue Type: Task
>            Reporter: Bikas Saha
>            Assignee: Tsuyoshi OZAWA
>         Attachments: YARN-2091.1.patch, YARN-2091.2.patch, YARN-2091.3.patch, YARN-2091.4.patch,
YARN-2091.5.patch, YARN-2091.6.patch
> Currently, the AM cannot programmatically determine if the task was killed due to using
excessive memory. The NM kills it without passing this information in the container status
back to the RM. So the AM cannot take any action here. The jira tracks adding this exit status
and passing it from the NM to the RM and then the AM. In general, there may be other such
actions taken by YARN that are currently opaque to the AM. 

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