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https://issues.apache.org/jira/browse/HADOOP-11506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated HADOOP-11506:
---------------------------------------------
Fix Version/s: 2.6.1
Pulled this into 2.6.1 after [~ajisakaa] verified that the patch applies
cleanly. (The 2.7 patch itself departed a bit from trunk). Ran compilation and
TestConfiguration before the push.
> 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
> Labels: 2.6.1-candidate
> Fix For: 2.6.1, 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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