JavaxWebSocketServletContainerInitializer fails

[janbartel]

When running the distro in jetty-10.0.x, the servletcontainer initializer for javax websocket fails with this message:

Error: javax.servlet.ServletContainerInitializer: org.eclipse.jetty.websocket.javax.server.JavaxWebSocketServletContainerInitializer Unable to get public no-arg constructor

Turning on debug for org.eclipse.jetty.annotations yields these underlying errors:

2019-07-01 16:16:24.233:DBUG:oeja.AnnotationConfiguration:main:
java.util.ServiceConfigurationError: javax.servlet.ServletContainerInitializer: org.eclipse.jetty.websocket.javax.server.JavaxWebSocketServletContainerInitializer Unable to get public no-arg constructor
at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:581)
at java.base/java.util.ServiceLoader.getConstructor(ServiceLoader.java:672)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1232)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1264)
at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1299)
at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1384)
at org.eclipse.jetty.annotations.AnnotationConfiguration.getNonExcludedInitializers(AnnotationConfiguration.java:834)
at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:355)
at org.eclipse.jetty.webapp.Configurations.configure(Configurations.java:484)
at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:557)

and:

Caused by:
java.lang.NoClassDefFoundError: javax/websocket/DeploymentException
at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3138)
at java.base/java.lang.Class.getConstructor0(Class.java:3343)
at java.base/java.lang.Class.getConstructor(Class.java:2152)
at java.base/java.util.ServiceLoader$1.run(ServiceLoader.java:659)
at java.base/java.util.ServiceLoader$1.run(ServiceLoader.java:656)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.util.ServiceLoader.getConstructor(ServiceLoader.java:667)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1232)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1264)
at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1299)
at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1384)
at org.eclipse.jetty.annotations.AnnotationConfiguration.getNonExcludedInitializers(AnnotationConfiguration.java:834)
at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:355)
at org.eclipse.jetty.webapp.Configurations.configure(Configurations.java:484)
at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:557)