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Date: Thu, 7 Feb 2013 20:39:13 +0000 (UTC)
From: "Siddharth Seth (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12610131.1349296388508.262520.1360269553473@arcas>
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Subject: [jira] [Commented] (YARN-142) Change YARN APIs to throw IOException
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    [ https://issues.apache.org/jira/browse/YARN-142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573901#comment-13573901 ] 

Siddharth Seth commented on YARN-142:
-------------------------------------

bq. and draw attention to the different subclasses in the javadoc if needed.
While YarnRemoteException is a subclass of IOException, explicitly calling it out in the API isn't super useful.  Was hoping to keep exceptions generated by YARN separate from RPC errors. 
The RPC layer, however, doesn not seem to handle anything other than IOException and it's derivatives. Changing YarnRemoteException to be independent of IOException would be in incompatible change at a later point - so maybe we should consider fixing the RPC layer to allow additional exceptions right now.


> Change YARN APIs to throw IOException
> -------------------------------------
>
>                 Key: YARN-142
>                 URL: https://issues.apache.org/jira/browse/YARN-142
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 0.23.3, 2.0.0-alpha
>            Reporter: Siddharth Seth
>            Assignee: Xuan Gong
>            Priority: Critical
>         Attachments: YARN-142.1.patch, YARN-142.2.patch, YARN-142.3.patch, YARN-142.4.patch
>
>
> Ref: MAPREDUCE-4067
> All YARN APIs currently throw YarnRemoteException.
> 1) This cannot be extended in it's current form.
> 2) The RPC layer can throw IOExceptions. These end up showing up as UndeclaredThrowableExceptions.

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