Client connections with HttpClient to a SPNEGO secured endpoint with TLS enabled break due to a misrepresentation of the SPN to include HTTPS instead of just HTTP.
The current use of HTTPClient 4.5.2 is affected by
HTTPCLIENT-1712 and breaks SPNEGO with HTTPS endpoints since it include the httpS in the principal name.
We need to migrate to at least 4.5.3 as we have tested with that version and observed it fixing the issue. Need to do some due diligence to determine the cleanest version to upgrade to but will provide a patch in a day or so.