Until 8.0.0-RC10 the classic hello-world websocket example (http://docs.oracle.com/javaee/7/tutorial/doc/websocket.htm) could 'work' (websocket fully connected). I use a basic example too in my project https://github.com/n11/mongo-cli-java, and noticed this issue when wanting to upgrade from <tomcat.version>8.0.0-RC5</tomcat.version> to <tomcat.version>8.0.3</tomcat.version> in pom.xml
Created attachment 31423 [details] screenshot websocket: not working, servlet: working
note: I'm testing it from tomcat-embedded library, but I suppose this is not different when deploying on a tomcat 8.0.1 server
This looks like a configuration problem. Bugzilla is not a support forum. Please use the Tomcat Users mailing list.
Created attachment 31426 [details] websocket tomcat 8.0.1 not working
Created attachment 31427 [details] websocket tomcat 8.0.0-RC10