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

[Radim Hatlapatka (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-6984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283170#comment-13283170 ] 

Radim Hatlapatka commented on WFLY-6984:
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When using IBM JDK and don't having by default installed version of openssl with ALPN, it will show the log message that it failed it would be worth pointing user to information how to resolve the issue.

> 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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