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https://issues.apache.org/jira/browse/HADOOP-15173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16326802#comment-16326802
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Lior Regev commented on HADOOP-15173:
-------------------------------------
I forgot to mention in the issue but creating OneFileInfo is performing a
side-effect of fetching file infos, which, in cases where one is accessing a
remote service (s3 for example) might actually give a performance hit
> Possible dead code in CombineFileInputFormat
> --------------------------------------------
>
> Key: HADOOP-15173
> URL: https://issues.apache.org/jira/browse/HADOOP-15173
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Lior Regev
> Priority: Minor
> Labels: newbie
>
> I found that in the file:
> hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/CombineFileInputFormat.java:280
> There's a generation of OneFileInfo[] without using that array ever again.
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