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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-8373) KerberosPlugin: Using multiple nodes on same machine leads clients to fetch TGT for every request
Date Tue, 08 Dec 2015 08:25:10 GMT

     [ https://issues.apache.org/jira/browse/SOLR-8373?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Noble Paul updated SOLR-8373:
-----------------------------
    Attachment: SOLR-8373.patch

smaller patch eliminating the change to the {{init()}}

> 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
>            Assignee: Noble Paul
>            Priority: Critical
>         Attachments: SOLR-8373.patch, SOLR-8373.patch, SOLR-8373.patch, SOLR-8373.patch,
SOLR-8373.patch
>
>
> 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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