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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/01/18 18:31:43 UTC

[jira] Created: (HADOOP-7110) Implement chmod with JNI

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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