Colin Patrick McCabe created HDFS-7556:
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             Summary: HardLink.java should use the jdk7 createLink method
                 Key: HDFS-7556
                 URL: https://issues.apache.org/jira/browse/HDFS-7556
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 2.7.0
            Reporter: Colin Patrick McCabe


Now that we are using jdk7, HardLink.java should use the jdk7 createLink method 
rather than our shell commands or JNI methods.

Note that we cannot remove all of the JNI / shell commands unless we remove the 
code which is checking the link count, something that jdk7 doesn't provide (at 
least, I don't think it does)



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