[Bug 64146] New: mod_proxy_hcheck is not compatible with h2/h2c protocol

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=64146

            Bug ID: 64146
           Summary: mod_proxy_hcheck is not compatible with h2/h2c
                    protocol
           Product: Apache httpd-2
           Version: 2.4.41
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_proxy_hcheck
          Assignee: bugs@httpd.apache.org
          Reporter: angeloxx+apache@angeloxx.ch
  Target Milestone: ---

Using this configuration:

 BalancerMember h2c://php73-a:443 hctemplate=serverstatus-php-v3 route=php73-a
timeout=180 flushpackets=on
 BalancerMember h2c://php73-b:443 hctemplate=serverstatus-php-v3 route=php73-b
timeout=180 flushpackets=on
 BalancerMember h2c://php73-c:443 hctemplate=serverstatus-php-v3 route=php73-c
timeout=180 flushpackets=on

 ProxyHCTemplate serverstatus-php-v3 hcmethod=GET
hcuri=/serverstatus-v2.php?waf-3 hcinterval=5 hcfails=4 hcpasses=2
hcexpr=goodstatus

mod_proxy_hcheck is unable to test the backend and the server state reamains in
"HcFl" status. mod_proxy_hcheck should be patched to support h2 backend or - at
minimum - enable the SSL support in hc_get_backend when h2c is set as backend
protocol and a valid port is configured, even if the check is performed with
HTTP/1.0.

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