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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2579) Starting delegation token manager during safemode fails
Date Mon, 21 Nov 2011 21:04:52 GMT
Starting delegation token manager during safemode fails
-------------------------------------------------------

                 Key: HDFS-2579
                 URL: https://issues.apache.org/jira/browse/HDFS-2579
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node, security
    Affects Versions: 0.23.0
            Reporter: Todd Lipcon


I noticed this on the HA branch, but it seems to actually affect non-HA branch 0.23 if security
is enabled. When the NN starts up, if security is enabled, we start the delegation token secret
manager, which then tries to call {{logUpdateMasterKey}}. This fails because the edit logs
may not be written while in safe-mode.

It seems to me that there's not any necessary reason that you have to make a new master key
at startup, since you've loaded the old key when you load the FSImage. You'd only be lacking
a DT master key on a fresh cluster, in which case we could have it generate one at format
time.

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