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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1481) Streaming should swallow IOExceptions when closing clientOut
Date Fri, 07 May 2010 23:23:48 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated MAPREDUCE-1481:
-----------------------------------

    Attachment: TestStreamingDontConsumeInput.java

quickly built a testcase for this, though no patch yet - the code is somewhat spaghetti.

> Streaming should swallow IOExceptions when closing clientOut
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-1481
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1481
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/streaming
>    Affects Versions: 0.20.1, 0.21.0, 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: TestStreamingDontConsumeInput.java
>
>
> in PipeMapRed.mapRedFinished, streaming flushes and closes clientOut_, the handle to
the subprocess's stdin. If the subprocess has already exited or closed its stdin, this will
generate a Broken Pipe IOException. This causes us to skip waitOutputThreads, which is incorrect,
since the subprocess may have data still written from stdout that needs to be read.

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