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From "Joydeep Sen Sarma (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3131) enabling BLOCK compression for map outputs breaks the reduce progress counters
Date Wed, 11 Jun 2008 00:45:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12604098#action_12604098
] 

Joydeep Sen Sarma commented on HADOOP-3131:
-------------------------------------------

interesting. can a patch be submitted for 17.*  as well? (generally seems useful and 17 has
a few minor releases to come ..)

> enabling BLOCK compression for map outputs breaks the reduce progress counters
> ------------------------------------------------------------------------------
>
>                 Key: HADOOP-3131
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3131
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.17.0, 0.17.1, 0.18.0
>            Reporter: Colin Evans
>         Attachments: merge-progress.patch, Picture 1.png
>
>
> Enabling map output compression and setting the compression type to BLOCK causes the
progress counters during the reduce to go crazy and report progress counts over 100%.

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