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From "Kan Zhang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6907) Rpc client doesn't use the per-connection conf to figure out server's Kerberos principal
Date Fri, 27 Aug 2010 21:47:54 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kan Zhang updated HADOOP-6907:
------------------------------

    Attachment: c6907-16.patch

an updated patch for current trunk.

> Rpc client doesn't use the per-connection conf to figure out server's Kerberos principal
> ----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6907
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6907
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc, security
>            Reporter: Kan Zhang
>            Assignee: Kan Zhang
>         Attachments: c6907-12.patch, c6907-15.patch, c6907-16.patch
>
>
> Currently, RPC client caches the conf that was passed in to its constructor and uses
that same conf (or values obtained from it) for every connection it sets up. This is not sufficient
for security since each connection needs to figure out server's Kerberos principal on a per-connection
basis. It's not reasonable to expect the first conf used by a user to contain all the Kerberos
principals that her future connections will ever need. Or worse, if her first conf contains
an incorrect principal name, it will prevent the user from connecting to the server even if
she later on passes in a correct conf on retry (by calling RPC.getProxy()).

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