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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3617) Writes from map serialization include redundant checks for accounting space
Date Sun, 22 Jun 2008 11:01:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607080#action_12607080
] 

Chris Douglas commented on HADOOP-3617:
---------------------------------------

The failing test, dfs.TestDatanodeDeath.testDatanodeDeath, is not related.

> Writes from map serialization include redundant checks for accounting space
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-3617
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3617
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>             Fix For: 0.19.0
>
>         Attachments: 3617-0.patch
>
>
> In BlockingBuffer::write, the collector verifies that there is sufficient space to hold
metadata when it returns to MapOutputBuffer::collect. This check is redundant for serialized
records that make more than one call to write.

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