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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5000) [YARN-3368] App attempt page is not loading when timeline server is not started
Date Fri, 06 May 2016 00:47:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-5000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15273408#comment-15273408

Wangda Tan commented on YARN-5000:


Tested the patch, haven't done deep tests, some comments so far

1) When I try the patch, run RM without TS/NM. The application is in ACCEPTED state, but the
application page has multiple entries of attempt: (see [attachment|https://issues.apache.org/jira/secure/attachment/12802571/screenshot-1.png]),
(This only happens when I access RM hosted page at localhost:8288, probably caused by auto/hash
issue which is mentioned by you at: https://issues.apache.org/jira/browse/YARN-4515?focusedCommentId=15269292&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15269292).

2) When an application is running (without enable TS, but NM is running). I get following
intermittent exception when keep refreshing page at: {{http://localhost:4200/yarnAppAttempt/appattempt_1462494543748_0004_000001
(replace by your attempt ID}}
yarn-container.js:31 http://localhost:1337/localhost:8188/ws/v1/applicationhistory/apps/applicat…494543748_0004/appattempts/appattempt_1462494543748_0004_000001/containers
ember.debug.js:30877 TypeError: Cannot read property '0' of undefined
    at Class.error (application.js:11)
    at Object.triggerEvent (ember.debug.js:27476)
    at Object.trigger (ember.debug.js:51925)
    at Object.trigger (ember.debug.js:51739)
    at ember.debug.js:51559
    at tryCatch (ember.debug.js:52258)
    at invokeCallback (ember.debug.js:52273)
    at publish (ember.debug.js:52241)
    at publishRejection (ember.debug.js:52176)
    at ember.debug.js:30835onerrorDefault @ ember.debug.js:30877trigger @ ember.debug.js:52928(anonymous
function) @ ember.debug.js:54177invoke @ ember.debug.js:320flush @ ember.debug.js:384flush
@ ember.debug.js:185end @ ember.debug.js:563run @ ember.debug.js:685run @ ember.debug.js:20105hash.success
@ rest-adapter.js:742fire @ jquery.js:3099fireWith @ jquery.js:3211done @ jquery.js:8264(anonymous
function) @ jquery.js:8605
jquery.js:8630 GET http://localhost:1337/localhost:8188/ws/v1/applicationhistory/apps/applicat…494543748_0004/appattempts/appattempt_1462494543748_0004_000001/containers
502 (Bad Gateway)

3) (MINOR), I can get this error at console when TS is not enabled:
{{jquery.js:8630 GET http://localhost:1337/localhost:8188/ws/v1/applicationhistory/apps/applicat…494543748_0004/appattempts/appattempt_1462494543748_0004_000001/containers
502 (Bad Gateway)}}, probably we should not show such message

For code implementation, some comments so far:
1) Instead of returning object with id="dummy" and check "dummy" everywhere, is it possible
to return an empty array? Which may be more clear.

> [YARN-3368] App attempt page is not loading when timeline server is not started
> -------------------------------------------------------------------------------
>                 Key: YARN-5000
>                 URL: https://issues.apache.org/jira/browse/YARN-5000
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Sunil G
>            Assignee: Sunil G
>         Attachments: 0001-YARN-5000.patch, AppFinishedAndNoTimelineServer.png, AppRunningAndNoTimelineServer.png,
AppRunningAndNoTimelineServer_v2.png, YARN-5000-YARN-3368.1.patch, YARN-5000-YARN-3368.2.patch,
YARN-5000-YARN-3368.3.patch, YARN-5000-YARN-3368.4.patch, screenshot-1.png
> If timeline server is not started, app attempt page is not getting loaded.
> In new web-ui, yarnContainer route is tightly coupled with both RM and Timeline server.
And if one of server is not up, page will not load. If timeline server is not up, container
information from RM is to be displayed.

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