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Posted to common-issues@hadoop.apache.org by "Dmitriy V. Ryaboy (JIRA)" <ji...@apache.org> on 2015/01/22 23:40:35 UTC

[jira] [Created] (HADOOP-11506) Configuration.get() is unnecessarily slow

Dmitriy V. Ryaboy created HADOOP-11506:
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             Summary: Configuration.get() is unnecessarily slow
                 Key: HADOOP-11506
                 URL: https://issues.apache.org/jira/browse/HADOOP-11506
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Dmitriy V. Ryaboy


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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