javax.servlet.ServletException: javax.websocket.DeploymentException: A parameter of type [interface javax.websocket.Session] was found on method[onOpen] of class [java.lang.reflect.Method] that did not have a @PathParam annotation

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via Stack Overflow by Shailesh Vaishampayan
, 1 year ago
javax.websocket.DeploymentException: A parameter of type [interface javax.websocket.Session] was found on method[onOpen] of class [java.lang.reflect.Method] that did not have a @PathParam annotation
via programkr.com by Unknown author, 2 years ago
javax.websocket.DeploymentException: Multiple Endpoints may not be deployed to using the same path [/websocket]
via Stack Overflow by Lucifer Swift
, 5 months ago
javax.websocket.DeploymentException: The path [websocket] is not valid.
via Stack Overflow by Asantha Thilina
, 1 year ago
javax.websocket.DeploymentException: No Throwable parameter was present on the method [onError] of class [org.analytic.dashboard.TrainNeuralNet] that was annotated with OnError
javax.servlet.ServletException: javax.websocket.DeploymentException: A parameter of type [interface javax.websocket.Session] was found on method[onOpen] of class [java.lang.reflect.Method] that did not have a @PathParam annotation
at org.apache.tomcat.websocket.pojo.PojoMethodMapping.getPathParams(PojoMethodMapping.java:233)
at org.apache.tomcat.websocket.pojo.PojoMethodMapping.(PojoMethodMapping.java:122)
at org.apache.tomcat.websocket.server.WsServerContainer.addEndpoint(WsServerContainer.java:239)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5444)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)

Users with the same issue

Samebug visitor profile picture
Unknown user
Once, 2 years ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago

Know the solutions? Share your knowledge to help other developers to debug faster.