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Posted to common-issues@hadoop.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2014/10/10 03:49:34 UTC
[jira] [Commented] (HADOOP-2) Reused Keys and Values fail with a
Combiner
[ https://issues.apache.org/jira/browse/HADOOP-2?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14166155#comment-14166155 ]
Hudson commented on HADOOP-2:
-----------------------------
FAILURE: Integrated in Ambari-branch-1.7.0 #43 (See [https://builds.apache.org/job/Ambari-branch-1.7.0/43/])
AMBARI-7229. Stack version must start with 2. to be considered Hadoop-2.x compatible. (jaimin) (jaimin: http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=25b5adc0e9233bffbbda877d807936c156de358d)
* ambari-web/app/app.js
* ambari-web/test/app_test.js
* ambari-web/app/mappers/stack_service_mapper.js
> 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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