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https://issues.apache.org/jira/browse/HADOOP-6490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125570#comment-13125570
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Hudson commented on HADOOP-6490:
--------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #1079 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/1079/])
HADOOP-6490. Use StringUtils over String#replace in Path#normalizePath.
Contributed by Uma Maheswara Rao G.
harsh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1182189
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/Path.java
> Path.normalize should use StringUtils.replace in favor of String.replace
> ------------------------------------------------------------------------
>
> Key: HADOOP-6490
> URL: https://issues.apache.org/jira/browse/HADOOP-6490
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.20.1
> Reporter: Zheng Shao
> Assignee: Uma Maheswara Rao G
> Priority: Minor
> Labels: newbie
> Fix For: 0.24.0
>
> Attachments: HADOOP-6490.patch
>
>
> in our environment, we are seeing that the JobClient is going out of memory
> because Path.normalizePath(String) is called several tens of thousands of
> times, and each time it calls "String.replace" twice.
> java.lang.String.replace compiles a regex to do the job which is very costly.
> We should use org.apache.commons.lang.StringUtils.replace which is much
> faster and consumes almost no extra memory.
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