Wangda Tan commented on YARN-2048:

Hi [~coderplay], +1 for this idea, it should be very helpful to debug YARN 
I took a look at your patch, some comments,
1) When AM restarted, all containers will be copied to new attempt's container 
list, which might lead user confuse why new attempt has all containers from old 
2) You might need consider following JIRAs to make app-containers page included 
all expected containers, YARN-556,YARN-1885,YARN-1489

> List all of the containers of an application from the yarn web
> --------------------------------------------------------------
>                 Key: YARN-2048
>                 URL: https://issues.apache.org/jira/browse/YARN-2048
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager, webapp
>    Affects Versions: 2.3.0, 2.4.0, 2.5.0
>            Reporter: Min Zhou
>         Attachments: YARN-2048-trunk-v1.patch
> Currently, Yarn haven't provide a way to list all of the containers of an 
> application from its web. This kind of information is needed by the 
> application user. They can conveniently know how many containers their 
> applications already acquired as well as which nodes those containers were 
> launched on.  They also want to view the logs of each container of an 
> application.
> One approach is maintain a container list in RMAppImpl and expose this info 
> to Application page. I will submit a patch soon

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