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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14687) AuthenticatedURL will reuse bad/expired session cookies
Date Tue, 22 Aug 2017 15:44:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16136961#comment-16136961

Jason Lowe commented on HADOOP-14687:

Thanks for clarifying.

+1 lgtm.  I'll commit this later today if there are no objections.

> 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
>         Attachments: HADOOP-14687.2.trunk.patch, HADOOP-14687.trunk.patch
> 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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