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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1773) ShuffleHeader should have a format that can inform about errors
Date Sat, 01 Mar 2014 01:47:20 GMT

     [ https://issues.apache.org/jira/browse/YARN-1773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Karthik Kambatla updated YARN-1773:
-----------------------------------

            Priority: Critical  (was: Major)
    Target Version/s: 2.4.0

> ShuffleHeader should have a format that can inform about errors
> ---------------------------------------------------------------
>
>                 Key: YARN-1773
>                 URL: https://issues.apache.org/jira/browse/YARN-1773
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Bikas Saha
>            Priority: Critical
>
> Currently, the ShuffleHeader (which is a Writable) simply tries to read the successful
header (mapid, reduceid etc). If there is an error then the input will have an error message
instead of (mapid, reducedid etc). Thus parsing the ShuffleHeader fails and since we dont
know where the error message ends, we cannot consume the remaining input stream which may
have good data from the remaining map outputs. Being able to encode the error in the ShuffleHeader
will let us parse out the error correctly and move on to the remaining data.



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