Path.normalize should use StringUtils.replace in favor of String.replace
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Key: HADOOP-6490
URL: https://issues.apache.org/jira/browse/HADOOP-6490
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 0.20.1
Reporter: Zheng Shao
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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