[jboss-jira] [JBoss JIRA] (WFLY-6984) Improve log message for Undertow HTTP2 when ALPN not available

[Jan Stourac (JIRA)]

Jan Stourac created WFLY-6984:
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             Summary: Improve log message for Undertow HTTP2 when ALPN not available
                 Key: WFLY-6984
                 URL: https://issues.jboss.org/browse/WFLY-6984
             Project: WildFly
          Issue Type: Enhancement
          Components: Web (Undertow)
    Affects Versions: 10.1.0.Final
            Reporter: Jan Stourac
            Assignee: Stuart Douglas
            Priority: Trivial


In case that Jetty ALPN is not available and HTTP2 is configured on HTTPS listener, Undertow prints error log message about it. Please direct user to documentation and also advice him how to get rid of this message otherwise.

Proposed change to:
{code}
Jetty ALPN not found on the boot class path. HTTP2 and SPDY are not available. Please check documentation how to configure Undertow to use HTTP2 or disable HTTP2 for HTTPS listeners to avoid this error message.
{code}



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