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From "Kannan Rajah (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2468) Log handling for LRS
Date Tue, 21 Oct 2014 18:30:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-2468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14178794#comment-14178794
] 

Kannan Rajah commented on YARN-2468:
------------------------------------

Xuan, I looked through the code changes and have a question about uploading logs for unfinished
containers. Let's say we have already uploaded syslog for a container at time T1. At time
T2, the container is still running and when the log aggregation is triggered again, will it
re-upload the same syslog file? That seems to be the case.

> Log handling for LRS
> --------------------
>
>                 Key: YARN-2468
>                 URL: https://issues.apache.org/jira/browse/YARN-2468
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: log-aggregation, nodemanager, resourcemanager
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>             Fix For: 2.6.0
>
>         Attachments: YARN-2468.1.patch, YARN-2468.10.patch, YARN-2468.11.patch, YARN-2468.2.patch,
YARN-2468.3.patch, YARN-2468.3.rebase.2.patch, YARN-2468.3.rebase.patch, YARN-2468.4.1.patch,
YARN-2468.4.patch, YARN-2468.5.1.patch, YARN-2468.5.1.patch, YARN-2468.5.2.patch, YARN-2468.5.3.patch,
YARN-2468.5.4.patch, YARN-2468.5.patch, YARN-2468.6.1.patch, YARN-2468.6.patch, YARN-2468.7.1.patch,
YARN-2468.7.patch, YARN-2468.8.patch, YARN-2468.9.1.patch, YARN-2468.9.patch
>
>
> Currently, when application is finished, NM will start to do the log aggregation. But
for Long running service applications, this is not ideal. The problems we have are:
> 1) LRS applications are expected to run for a long time (weeks, months).
> 2) Currently, all the container logs (from one NM) will be written into a single file.
The files could become larger and larger.



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