[jira] [Created] (SOLR-8373) KerberosPlugin: Using multiple nodes on same machine leads clients to fetch TGT for every request

["Ishan Chattopadhyaya (JIRA)" <ji...@apache.org>]

Ishan Chattopadhyaya created SOLR-8373:
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             Summary: KerberosPlugin: Using multiple nodes on same machine leads clients to fetch TGT for every request
                 Key: SOLR-8373
                 URL: https://issues.apache.org/jira/browse/SOLR-8373
             Project: Solr
          Issue Type: Bug
            Reporter: Ishan Chattopadhyaya
            Priority: Critical


Kerberized solr nodes accept negotiate/spnego/kerberos requests and processes them. It also passes back to the client a cookie called "hadoop.auth" (which is currently unused, but will eventually be used for delegation tokens). 

If two or more nodes are on the same machine, they all send out the cookie which have the same domain (hostname) and same path, but different cookie values.

Upon receipt at the client, if a cookie is rejected (which in this case will be), the client compulsorily gets a ​​*new*​​ TGT from the KDC instead of reading the same ticket from the ticketcache. This is causing the heavy traffic at the KDC, plus intermittent "Request is a replay" (which indicates race condition at KDC while handing out the TGT for the same principal).




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