Implement chmod with JNI
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Key: HADOOP-7110
URL: https://issues.apache.org/jira/browse/HADOOP-7110
Project: Hadoop Common
Issue Type: Improvement
Components: io, native
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Fix For: 0.22.0
MapReduce is currently using a race-prone workaround to approximate chmod()
because forking chmod is too expensive. This race is causing build failures
(and probably task failures too). We should implement chmod in the NativeIO
library so we can have good performance (ie not fork) and still not be prone to
races.
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