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https://issues.apache.org/jira/browse/HADOOP-11506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309313#comment-14309313
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Hudson commented on HADOOP-11506:
---------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #2047 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2047/])
HADOOP-11506. Configuration variable expansion regex expensive for long values.
(Gera Shegalov via gera) (gera: rev 644548f201743408904dfe24b9f5b515b2c96713)
* hadoop-common-project/hadoop-common/CHANGES.txt
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfiguration.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
> Configuration variable expansion regex expensive for long values
> ----------------------------------------------------------------
>
> Key: HADOOP-11506
> URL: https://issues.apache.org/jira/browse/HADOOP-11506
> Project: Hadoop Common
> Issue Type: Improvement
> Components: conf
> Reporter: Dmitriy V. Ryaboy
> Assignee: Gera Shegalov
> Fix For: 2.7.0
>
> Attachments: HADOOP-11506.001.patch, HADOOP-11506.002.patch,
> HADOOP-11506.003.patch, HADOOP-11506.004.patch
>
>
> Profiling several large Hadoop jobs, we discovered that a surprising amount
> of time was spent inside Configuration.get, more specifically, in regex
> matching caused by the substituteVars call.
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