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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-14687) AuthenticatedURL will reuse bad/expired session cookies
Date Wed, 26 Jul 2017 13:23:00 GMT
Daryn Sharp created HADOOP-14687:
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             Summary: AuthenticatedURL will reuse bad/expired session cookies
                 Key: HADOOP-14687
                 URL: https://issues.apache.org/jira/browse/HADOOP-14687
             Project: Hadoop Common
          Issue Type: Bug
          Components: common
    Affects Versions: 2.6.0
            Reporter: Daryn Sharp
            Assignee: Daryn Sharp
            Priority: Critical


AuthenticatedURL with kerberos was designed to perform spnego, then use a session cookie to
avoid renegotiation overhead.  Unfortunately the client will continue to use a cookie after
it expires.  Every request elicits a 401, connection closes (despite keepalive because 401
is an "error"), TGS is obtained, connection re-opened, re-requests with TGS, repeat cycle.
 This places a strain on the kdc and creates lots of time_wait sockets.
 
The main problem is unbeknownst to the auth url, the JDK transparently does spnego.  The server
issues a new cookie but the auth url doesn't scrape the cookie from the response because it
doesn't know the JDK re-authenticated.



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