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https://issues.apache.org/jira/browse/HTTPCLIENT-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16195305#comment-16195305
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Gary Gregory commented on HTTPCLIENT-1873:
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Hi All.
All this kind of sys prop twiddling is just hacking with global variables by
another name. Using a static variable is no better. When I discussed this issue
at work with the developer who did our Kerberos module (using Kerby and custom
bits), he did advise me explicitly "please, no system properties". You can
translate that to "no global variables: no system properties, no environment
variables, no static variables."
Just think of living in a world of multi-tenancy...
Gary
> Kerberos delegation no longer working after HTTPCLIENT-1736 patch in version
> 4.5.3
> ----------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1873
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1873
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic), HttpClient (Windows)
> Affects Versions: 4.5.3, 4.5.4
> Environment: Windows,Linux
> Reporter: Ulrich Colby
> Priority: Minor
> Labels: easyfix
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> In version 4.5.3, the following fix got applied to the httpclient library:
> _ [HTTPCLIENT-1736] do not request cred delegation by default when using
> Kerberos auth.
> Contributed by Oleg Kalnichevski <olegk at apache.org>_
> Although it says "by default", when looking at the affected code it's not the
> case (i.e.: there is no way to request if we want it). From our tests and my
> understanding of Kerberos, if a user account is not allowed to be used for
> delegation, then you can still request delegation, but when creating the user
> token, it'll simply not be applied.
> +Affected area+:
> In the class "GSSSchemeBase", in the method "createGSSContext", we need the
> following line added back:
> *gssContext.requestCredDeleg(true);*
> **OR**
> If you insist of leaving it off for a reason I'm not aware of, having a way,
> maybe through a system property, to say that we want it.
> _IMHO, one of the main reason for using Kerberos in an enterprise environment
> is to be able to make use of delegation (double hop scenarios)._
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