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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-2) Reused Keys and Values fail with a Combiner
Date Tue, 11 Aug 2015 03:55:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14681200#comment-14681200
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Hudson commented on HADOOP-2:
-----------------------------

FAILURE: Integrated in HBase-1.2 #99 (See [https://builds.apache.org/job/HBase-1.2/99/])
HBASE-5878 Use getVisibleLength public api from HdfsDataInputStream from Hadoop-2. (apurtell:
rev 7f33e6330a37b0401c2f9143ddbea67361217453)
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogReader.java


> Reused Keys and Values fail with a Combiner
> -------------------------------------------
>
>                 Key: HADOOP-2
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>             Fix For: 0.1.0
>
>         Attachments: clone-map-output.patch
>
>
> If the map function reuses the key or value by destructively modifying it after the output.collect(key,value)
call and your application uses a combiner, the data is corrupted by having lots of instances
with the last key or value.



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