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https://issues.apache.org/jira/browse/HTTPCLIENT-2077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092436#comment-17092436
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Alexander Kohanov commented on HTTPCLIENT-2077:
-----------------------------------------------
Pull request with a fix submitted for review:
[https://github.com/apache/httpcomponents-client/pull/223]
> Migration from HttpClient v4.5.x to v5.0 causes NTLM proxy authentication
> failure
> ---------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-2077
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2077
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 5.0
> Reporter: Alexander Kohanov
> Priority: Major
> Attachments: NtlmProxyAuthenticationTest.java,
> NtlmProxyAuthenticationTest.log
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Upgrade of HttpClient from v4.5.x to v5.0 causes a NTLM proxy authentication
> failure (s. attached test class [^NtlmProxyAuthenticationTest.java] with
> generated log file [^NtlmProxyAuthenticationTest.log]).
> Error logged:
> {code:java}
> 01:27:20.360 [main] DEBUG
> org.apache.hc.client5.http.impl.auth.HttpAuthenticator - Authentication failed
> ----------------------------------------
> 407 authenticationrequired
>
> {code}
>
> The same class implemented with HttpClient v4.5.x does not have any proxy
> issues and connects to the target as expected.
>
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