[jira] Created: (HADOOP-2423) The codes in FSDirectory.mkdirs(...) is inefficient.

[Tsz Wo (Nicholas), SZE (JIRA)]

The codes in FSDirectory.mkdirs(...) is inefficient.
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                 Key: HADOOP-2423
                 URL: https://issues.apache.org/jira/browse/HADOOP-2423
             Project: Hadoop
          Issue Type: Improvement
          Components: dfs
    Affects Versions: 0.15.1
            Reporter: Tsz Wo (Nicholas), SZE


FSDirectory.mkdirs(...) creates a list of string storing all  

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