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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4205) Add a service for monitoring application life time out
Date Wed, 21 Sep 2016 03:04:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-4205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15508541#comment-15508541
] 

Rohith Sharma K S commented on YARN-4205:
-----------------------------------------

bq. Shouldn't it be counted from the time YARN allocates resource for the AM and launches
it? What if YARN takes more time than the lifetime to allocate resource for the app? Seems
like the KILL event will be raised immediately after the app reaches the RUNNING state in
this case. Am I correct?
Basically this point got discussed in earlier comments also, this JIRA is to track lifetime
of an application. Defining lifetime is nothing but overall execution_time of application
from submission time. Application get killed at any point of time. Basically user is imposing
timeout for execution time. Use case is every 5 minutes he submits a application and user
need output with in 5 minutes. Use do not worry for time-consumed on statestore or allocation
or any other which is not user facing also. 
Considering each stages of timeout, in future any other timeouts can be added to ApplicationTimeouts
class. ApplicationTimeouts java doc also gives definition of lifetime.

bq. Should AMRMClientAsync.onShutdownRequest callback be raised to give AM to do some last
minute work/cleanup/graceful-shutdown-opportunity?
Good point and need to discuss more in general. IIUC, killing an application does not allow
AM containers to do some clean up. I think the JIRA YARN-2261 is intended to do such post
clean up.

> Add a service for monitoring application life time out
> ------------------------------------------------------
>
>                 Key: YARN-4205
>                 URL: https://issues.apache.org/jira/browse/YARN-4205
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler
>            Reporter: nijel
>            Assignee: Rohith Sharma K S
>         Attachments: 0001-YARN-4205.patch, 0002-YARN-4205.patch, 0003-YARN-4205.patch,
0004-YARN-4205.patch, 0005-YARN-4205.patch, YARN-4205_01.patch, YARN-4205_02.patch, YARN-4205_03.patch
>
>
> This JIRA intend to provide a lifetime monitor service. 
> The service will monitor the applications where the life time is configured. If the application
is running beyond the lifetime, it will be killed. 
> The lifetime will be considered from the submit time.
> The thread monitoring interval is configurable.



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