Websocket protocol not supported

cliviu · October 8, 2024, 4:36pm

Hi,
I have just upgraded to Vaadin 24.4.11 using Jetty 11.0.24.
I get this warning in the log

AsynchronousProcessor |WARN |Websocket protocol not supported

Any hints about what the problem can be?

marcoc_753 · October 8, 2024, 4:54pm

Embedded Jetty? Maybe the websocket-jetty-server module is missing?

cliviu · October 9, 2024, 7:37am

Actually websocket-jetty-server is there. Any other hint?

marcoc_753 · October 9, 2024, 7:49am

Hard to say without additional information. Can you share the project or a reproducible example?

cliviu · October 9, 2024, 8:06am

I cannot provide a reproducible example.
I have debugged a bit and I have noticed that in the org.atmosphere.util.Utils class, the condition boolean allowWebSocketWithoutHeaders = request.getHeader(HeaderConfig.X_ATMO_WEBSOCKET_PROXY) != null;
returns false but I am not sure from where it comes or what should I do to fix it …

we have configured
our AppShellConfigurator with

@Push(value = PushMode.AUTOMATIC, transport = Transport.WEBSOCKET)

cliviu · October 9, 2024, 8:17am

Some logging, maybe you can see something there:

2024-10-09 10:10:48,762|AtmosphereFramework           |INFO |Installed AtmosphereHandler com.vaadin.flow.server.communication.PushAtmosphereHandler mapped to context-path: /*
2024-10-09 10:10:48,762|AtmosphereFramework           |INFO |Installed the following AtmosphereInterceptor mapped to AtmosphereHandler com.vaadin.flow.server.communication.PushAtmosphereHandler
2024-10-09 10:10:48,775|AtmosphereFramework           |INFO |Atmosphere is using org.atmosphere.util.VoidAnnotationProcessor for processing annotation
2024-10-09 10:10:48,776|AtmosphereFramework           |DEBUG|Scanning all classes on the classpath
2024-10-09 10:10:48,783|AtmosphereFramework           |INFO |Installed WebSocketProtocol org.atmosphere.websocket.protocol.SimpleHttpProtocol 
2024-10-09 10:10:48,784|DefaultAsyncSupportResolver   |DEBUG|Found jakarta.servlet.AsyncListener
2024-10-09 10:10:48,785|DefaultAsyncSupportResolver   |DEBUG|Found jakarta.servlet.AsyncListener
2024-10-09 10:10:48,786|AtmosphereFramework           |INFO |Installing Default AtmosphereInterceptors
2024-10-09 10:10:48,787|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.CorsInterceptor : CORS Interceptor Support
2024-10-09 10:10:48,787|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.CacheHeadersInterceptor : Default Response's Headers Interceptor
2024-10-09 10:10:48,787|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.PaddingAtmosphereInterceptor : Browser Padding Interceptor Support
2024-10-09 10:10:48,787|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.AndroidAtmosphereInterceptor : Android Interceptor Support
2024-10-09 10:10:48,788|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.HeartbeatInterceptor : Heartbeat Interceptor Support
2024-10-09 10:10:48,788|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.SSEAtmosphereInterceptor : SSE Interceptor Support
2024-10-09 10:10:48,788|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.JSONPAtmosphereInterceptor : JSONP Interceptor Support
2024-10-09 10:10:48,789|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.JavaScriptProtocol : Atmosphere JavaScript Protocol
2024-10-09 10:10:48,789|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.WebSocketMessageSuspendInterceptor : org.atmosphere.interceptor.WebSocketMessageSuspendInterceptor
2024-10-09 10:10:48,789|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.OnDisconnectInterceptor : Browser disconnection detection
2024-10-09 10:10:48,789|AtmosphereFramework           |INFO |	org.atmosphere.interceptor.IdleResourceInterceptor : org.atmosphere.interceptor.IdleResourceInterceptor
2024-10-09 10:10:48,789|AtmosphereFramework           |INFO |Set org.atmosphere.cpr.AtmosphereInterceptor.disableDefaults to disable them.
2024-10-09 10:10:48,789|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor CORS Interceptor Support with priority FIRST_BEFORE_DEFAULT 
2024-10-09 10:10:48,791|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor Default Response's Headers Interceptor with priority AFTER_DEFAULT 
2024-10-09 10:10:48,791|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor Browser Padding Interceptor Support with priority AFTER_DEFAULT 
2024-10-09 10:10:48,791|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor Android Interceptor Support with priority AFTER_DEFAULT 
2024-10-09 10:10:48,791|HeartbeatInterceptor          |INFO |HeartbeatInterceptor configured with padding value 'X', client frequency 0 seconds and server frequency 60 seconds
2024-10-09 10:10:48,791|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor Heartbeat Interceptor Support with priority AFTER_DEFAULT 
2024-10-09 10:10:48,791|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor SSE Interceptor Support with priority AFTER_DEFAULT 
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor JSONP Interceptor Support with priority AFTER_DEFAULT 
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor Atmosphere JavaScript Protocol with priority AFTER_DEFAULT 
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor org.atmosphere.interceptor.WebSocketMessageSuspendInterceptor with priority AFTER_DEFAULT 
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor Browser disconnection detection with priority AFTER_DEFAULT 
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor org.atmosphere.interceptor.IdleResourceInterceptor with priority BEFORE_DEFAULT 
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Using EndpointMapper class org.atmosphere.util.DefaultEndpointMapper
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Using BroadcasterCache: org.atmosphere.cache.UUIDBroadcasterCache
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Default Broadcaster Class: org.atmosphere.cpr.DefaultBroadcaster
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Broadcaster Shared List Resources: false
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Broadcaster Polling Wait Time 100
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Shared ExecutorService supported: true
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Messaging Thread Pool Size: 10
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Async I/O Thread Pool Size: 10
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Using BroadcasterFactory: org.atmosphere.cpr.DefaultBroadcasterFactory
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Using AtmosphereResurceFactory: org.atmosphere.cpr.DefaultAtmosphereResourceFactory
2024-10-09 10:10:48,792|AtmosphereFramework           |INFO |Using WebSocketProcessor: org.atmosphere.websocket.DefaultWebSocketProcessor
2024-10-09 10:10:48,793|AtmosphereFramework           |INFO |Invoke AtmosphereInterceptor on WebSocket message true
2024-10-09 10:10:48,793|AtmosphereFramework           |INFO |HttpSession supported: true
2024-10-09 10:10:48,793|AtmosphereFramework           |INFO |Atmosphere is using DefaultAtmosphereObjectFactory for dependency injection and object creation
2024-10-09 10:10:48,793|AtmosphereFramework           |INFO |Atmosphere is using async support: org.atmosphere.container.Servlet30CometSupport running under container: jetty/11.0.24 using jakarta.servlet/3.0
2024-10-09 10:10:48,793|AtmosphereFramework           |INFO |Atmosphere Framework 3.0.5.slf4jvaadin1 started.
2024-10-09 10:10:48,797|AtmosphereFramework           |INFO |Installed AtmosphereInterceptor  Track Message Size Interceptor using | with priority BEFORE_DEFAULT 

2024-10-09 10:10:54,076|AsynchronousProcessor         |WARN |Websocket protocol not supported
2024-10-09 10:10:59,147|AsynchronousProcessor         |WARN |Websocket protocol not supported

marcoc_753 · October 9, 2024, 9:26am

At least this log is suspicious

Atmosphere is using async support: org.atmosphere.container.Servlet30CometSupport running under container: jetty/11.0.24 using jakarta.servlet/3.0

I woudl put a breakpoint in DefaultAsyncSupportResolver.resolve() to find out why JSR356AsyncSupport is not detected.

Two possible reasons:

jakarta.websocket.Endpoint class is not found in classpath
org.atmosphere.websocket.suppressJSR356 init paramter is set to true

cliviu · October 9, 2024, 10:09am

I added the missing libraries. Now I’m into this logging message :

2024-10-09 12:07:43,093|DefaultAsyncSupportResolver   |WARN |Failed to create AsyncSupport class: class org.atmosphere.container.JSR356AsyncSupport, error: java.lang.reflect.InvocationTargetException

marcoc_753 · October 9, 2024, 10:13am

Most likely some missing configuration. You can check if you are facing this issue Websocket fails with Vaadin 24 and Jetty 12 · Issue #17244 · vaadin/flow · GitHub

cliviu · October 9, 2024, 10:42am

Yes, I agree that there is some glue missing. Unfortunately the link that you sent is for Jetty 12, I’m using 11.

marcoc_753 · October 9, 2024, 10:45am

There’s also the same example project in branch 11.0.x. Maybe that could help

github.com

jetty-project/embedded-jetty-websocket-examples/blob/11.0.x/jakarta.websocket-example/src/main/java/org/eclipse/jetty/demo/EventServer.java

//
// ========================================================================
// Copyright (c) Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.demo;

import java.net.URI;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.servlet.ServletContextHandler;

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cliviu · October 9, 2024, 12:38pm

Thank you, I got it finally:

Atmosphere is using async support: org.atmosphere.container.JSR356AsyncSupport running under container: jetty/11.0.24 using jakarta.servlet/3.0 and jsr356/WebSocket API

There was no missing configuration, but some missing library:

            <dependency>
                <groupId>org.eclipse.jetty.websocket</groupId>
                <artifactId>websocket-jakarta-server</artifactId>
            </dependency>

it was confusing because there was no error message besides of that warning:

AsynchronousProcessor |WARN |Websocket protocol not supported

Debugging the DefaultAsyncSupportResolver.resolve() was crucial.

Thank you once more!