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From "Hitesh Shah (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TEZ-900) Confusing message for incorrect queue for some tez examples
Date Tue, 03 Feb 2015 17:33:34 GMT

    [ https://issues.apache.org/jira/browse/TEZ-900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14303649#comment-14303649
] 

Hitesh Shah commented on TEZ-900:
---------------------------------

[~lichangleo] Understood but fighting to explain to someone how to use the API in a "correct"
way is not the right battle to fight. Also, it means that there is a problem in the API in
the first place. 

Let us consider the case of submitting a yarn application to an invalid queue. First question
- does YarnClient::submitApplication throw an exception if the app was submitted to an invalid
queue? If yes, this should be bubbled up back to the user in either TezClient::start() or
TezClient::submitDAG(). If not, this becomes a YARN bug. If the error shows up asynchronously,
relying on getAppMasterStatus is flaky as that becomes timing dependent i.e if a user calls
it too quickly, the app might not be in its final state.

In either case, let us consider the case that the user does not call getAppMasterStatus()
or waitTIllReady(). I think in this case, we should fix the submitDAG ( and any other APIs
that the user may call ) to propagate the error back in both the session and non-session cases
if the AM failed to launch properly. 


> Confusing message for incorrect queue for some tez examples
> -----------------------------------------------------------
>
>                 Key: TEZ-900
>                 URL: https://issues.apache.org/jira/browse/TEZ-900
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.3.0
>            Reporter: Jonathan Eagles
>            Assignee: Chang Li
>
> The error message of at least orderedwordcount with non-existent queue is very difficult
as compared to mrrsleep which is very intuitive.



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