Ben Plotnick created HTTPCLIENT-2344:
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             Summary: HTTP/1.1 TLS Upgrade (RFC-2817) should not be default
                 Key: HTTPCLIENT-2344
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2344
             Project: HttpComponents HttpClient
          Issue Type: Bug
          Components: HttpCache
    Affects Versions: 5.4
            Reporter: Ben Plotnick


Version 5.4 added RFC-2817 support, which by default tries to upgradeĀ  since 
protocolUpgradeEnabled is default enabled.

Although the strict reading of the spec would indicate that a server should 
ignore upgrade requests that it cannot service, conservative proxies might 
reject these requests entirely. This is the case in Envoy today

I don't see a big advantage to enabling this by default and it is causing real 
issues now.



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