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https://issues.apache.org/jira/browse/GIRAPH-266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421907#comment-13421907
]
Hudson commented on GIRAPH-266:
-------------------------------
Integrated in Giraph-trunk-Commit #151 (See
[https://builds.apache.org/job/Giraph-trunk-Commit/151/])
GIRAPH-266: Average aggregators don't calculate real average
(majakabiljo via aching). (Revision 1365372)
Result = SUCCESS
aching : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1365372
Files :
* /giraph/trunk/CHANGELOG
*
/giraph/trunk/src/main/java/org/apache/giraph/aggregators/DoubleAverageAggregator.java
*
/giraph/trunk/src/main/java/org/apache/giraph/aggregators/FloatAverageAggregator.java
*
/giraph/trunk/src/test/java/org/apache/giraph/aggregators/TestDoubleAggregators.java
*
/giraph/trunk/src/test/java/org/apache/giraph/aggregators/TestFloatAggregators.java
> Average aggregators don't calculate real average
> ------------------------------------------------
>
> Key: GIRAPH-266
> URL: https://issues.apache.org/jira/browse/GIRAPH-266
> Project: Giraph
> Issue Type: Bug
> Reporter: Maja Kabiljo
> Assignee: Maja Kabiljo
> Attachments: GIRAPH-266.patch
>
>
> Average aggregators calculate average on workers, and then workers' averages
> are sent to the master, where we actually calculate the average of averages.
> For example, if one worker aggregates value 2, the other values 4 and 6, and
> third values 8, 8 and 8, we'll get the result of 5 instead of 6.
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