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Date: Fri, 18 Aug 2017 18:26:01 +0000 (UTC)
From: "Daryn Sharp (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.13090199.1501075337000.67076.1503080761122@Atlassian.JIRA>
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References: <JIRA.13090199.1501075337000@Atlassian.JIRA> <JIRA.13090199.1501075337958@jira-lw-us.apache.org>
Subject: [jira] [Commented] (HADOOP-14687) AuthenticatedURL will reuse
 bad/expired session cookies
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archived-at: Fri, 18 Aug 2017 18:26:08 -0000


    [ https://issues.apache.org/jira/browse/HADOOP-14687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16133410#comment-16133410 ] 

Daryn Sharp commented on HADOOP-14687:
--------------------------------------

I'm a bit confused about the findbugs.  It formerly also very clearly returned null but wasn't flagged?  I can make it return empty string but I'm always leery of changing behaviors of code in comon...

The test failures are completely unrelated.

> 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.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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