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Posted to dev@lucene.apache.org by "Ishan Chattopadhyaya (JIRA)" <ji...@apache.org> on 2015/12/24 09:33:49 UTC

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

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

Ishan Chattopadhyaya reopened SOLR-8373:
----------------------------------------

> 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
>             Fix For: 5.5, Trunk
>
>         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 gets a TGT from the KDC. 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). I think having a (well configured) ticket cache is a potential solution, but having cookies get rejected is bad enough.



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