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Posted to issues@tez.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2015/06/30 06:46:04 UTC

[jira] [Updated] (TEZ-2584) Investigate: Reducers with local errors can run indefinitely

     [ https://issues.apache.org/jira/browse/TEZ-2584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajesh Balamohan updated TEZ-2584:
----------------------------------
    Target Version/s: 0.8.0

> Investigate: Reducers with local errors can run indefinitely
> ------------------------------------------------------------
>
>                 Key: TEZ-2584
>                 URL: https://issues.apache.org/jira/browse/TEZ-2584
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Rajesh Balamohan
>
> When local errors (e.g disk error) are there, fetchers are expected to throw error and it is expected to restart the task elsewhere.  With master branch, reducer continues to run indefinitely.  Creating this jira to investigate the issue. I don't have a test case for this, but can be easily be simulated by throwing IOException purposefully in FetcherOrderedGrouped-->copyMapOutput (reserve()). 



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