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From "Kan Zhang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-7091) reloginFromKeytab() should happen even if TGT can't be found
Date Thu, 06 Jan 2011 22:40:45 GMT
reloginFromKeytab() should happen even if TGT can't be found
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                 Key: HADOOP-7091
                 URL: https://issues.apache.org/jira/browse/HADOOP-7091
             Project: Hadoop Common
          Issue Type: Bug
          Components: security
            Reporter: Kan Zhang
            Assignee: Kan Zhang


HADOOP-6965 introduced a getTGT() method and prevents reloginFromTGT() from happening when
TGT is not found. This results in the RPC layer not being able to refresh TGT after TGT expires.
The reason is RPC layer only does relogin when the expired TGT is used and an exception is
thrown. However, when that happens, the expired TGT will be removed from Subject. Therefore,
getTGT() will return null and relogin will not be performed. We observed that, for example,
JT will not be able to re-connect to NN after TGT expires.

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