• Make sure that your local env is set to the correct java version
• Update the number of max threads from application.properties file
• To run the test import ws-client-test
• For some of the tests depending on the number of max threads set it will take a while till they freeze
• Issue reproducable on spring-cometd-v5-tomcat-v8, spring-cometd-v5-tomcat-v9, WebSocketEndPoint:onMessage but not on spring-cometd-v3-tomcat-v8 because it doesn't block AbstractWebSocketTransaport.java:onMessage
• To test that all threads are stuck visit localhost:8085/hello