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https://issues.apache.org/jira/browse/HTTPCLIENT-2402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18031244#comment-18031244
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Michael Osipov commented on HTTPCLIENT-2402:
--------------------------------------------

There is a simple rule: Security contexts are NOT thread safe and shall not be 
reused between threads. One thread/worker equals one security context. This is 
what happens if you do: 
https://github.com/ezhov-evgeny/webdav-client-python-3/issues/93

> Handle SecurityManager removal
> ------------------------------
>
>                 Key: HTTPCLIENT-2402
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2402
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>            Reporter: Istvan Toth
>            Priority: Major
>
> There are two aspect to these changes: 
> - replacing Subject.doAs() with Subject.callAs()
> - handling the changed thread semantics, where the Current Subject is nonger 
> propagated to new Threads.
> Httpclient doesn't currently use the disabled methods.
> They are used in HTTPCLIENT-2358, which already includes the SecurityUtils to 
> map the doAs/CallAs function based on the JVM version.
> The Subject propagation issue breaks SPNEGO authentication for the Async 
> client, as the Subject is no longer propagated to the executor threads for 
> the Async operations.
> There is no current test for that, I will add new tests to HTTPCLIENT-2358 to 
> cover this case.



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