Thanks Stuart for the quick response. Now I have server started with HTTP/2 and it works perfect with some client tools. Now I am looking for Java HTTP/2 client libraries to update my client module to support HTTP/2 protocol for microservices communication. There are three major libraries okhttp, jetty and netty but all of them require Jetty's ALPN boot JAR. I saw you have resolved the boot jar dependency in Undertow and am wondering if you could point me to the right direction. Do you have any recommendation for HTTP/2 client library? How do you work around the alpn boot jar? Is the same solution can be used by okhttp, jetty and netty before Java 9 is released?

 

On Fri, Mar 17, 2017 at 11:03 PM, Stuart Douglas <sdouglas@redhat.com> wrote:
No, that is a debug level message. The JDK8 ALPN provider should still
be registered.

Stuart

On Sat, Mar 18, 2017 at 12:18 PM, Steve Hu <stevehu@gmail.com> wrote:
> Hi,
>
> I searched this mailing list and one post mentioned that I don't need to use
> -Xbootclasspath/p:<path_to_alpn_boot_jar> after 1.4.0Final. I am trying
> HTTP/2 on my server with 1.4.10 and Oracle JDK 1.8 but when I start the
> server I got the following error. Do I have to use OpenJDK 8? If I switch to
> JBoss OpenSSL implementation?
>
> Thanks,
>
> Steve
>
> 21:00:36.468 [main]  DEBUG io.undertow - Configuring listener with protocol
> HTTPS for interface 0.0.0.0 and port 8843
>
> 21:00:36.486 [main]  DEBUG io.undertow - JDK9 ALPN not supported
>
> java.lang.NoSuchMethodException:
> javax.net.ssl.SSLParameters.setApplicationProtocols([Ljava.lang.String;)
>
> at java.lang.Class.getMethod(Class.java:1786)
>
> at
> io.undertow.protocols.alpn.JDK9AlpnProvider$1.run(JDK9AlpnProvider.java:47)
>
> at
> io.undertow.protocols.alpn.JDK9AlpnProvider$1.run(JDK9AlpnProvider.java:43)
>
> at java.security.AccessController.doPrivileged(Native Method)
>
> at
> io.undertow.protocols.alpn.JDK9AlpnProvider.<clinit>(JDK9AlpnProvider.java:43)
>
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
>
> at java.lang.Class.newInstance(Class.java:442)
>
> at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
>
> at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
>
> at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
>
> at io.undertow.protocols.alpn.ALPNManager.<init>(ALPNManager.java:40)
>
> at io.undertow.protocols.alpn.ALPNManager.<clinit>(ALPNManager.java:35)
>
> at
> io.undertow.server.protocol.http.AlpnOpenListener.<init>(AlpnOpenListener.java:67)
>
> at
> io.undertow.server.protocol.http.AlpnOpenListener.<init>(AlpnOpenListener.java:90)
>
> at io.undertow.Undertow.start(Undertow.java:179)
>
> at com.networknt.server.Server.start(Server.java:170)
>
> at com.networknt.server.Server.main(Server.java:90)
>
> 21:00:36.503 [main]  INFO  com.networknt.server.Server - Https Server
> started on ip:0.0.0.0 Port:8843
>
>
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