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From "Daryn Sharp (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2589) unnecessary hftp token fetch and renewal thread
Date Wed, 23 Nov 2011 19:25:40 GMT
unnecessary hftp token fetch and renewal thread

                 Key: HDFS-2589
                 URL: https://issues.apache.org/jira/browse/HDFS-2589
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: security
    Affects Versions:
            Reporter: Daryn Sharp
            Assignee: Daryn Sharp

Instantiation of the hftp filesystem is causing a token to be implicitly created and added
to a custom token renewal thread.  With the new token renewal feature in the JT, this causes
the mapreduce {{obtainTokensForNamenodes}} to fetch two tokens (an implicit and uncancelled
token, and an explicit token) and leave a spurious renewal thread running.  This thread should
not be running in the JT.

After speaking with Owen, the quick solution is to lazy fetch the token, and to lazy start
the renewer thread.

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