Websocket JSR-356 使用 Jetty 9.4.1 失败

Question

我当前的网络服务器是嵌入式 Jetty 9.1.5。它可以很好地与 JSR-356 一起创建 websocket。这些天，我正在尝试升级到 Jetty 9.4.1。除了 websocket，一切都很好。
我的代码如下：

嵌入式 Jetty 和 Websocket 库：

<dependency>
   <groupId>org.eclipse.jetty</groupId>
   <artifactId>jetty-server</artifactId>
   <version>9.4.1.v20170120</version>
</dependency>
<dependency>
   <groupId>org.eclipse.jetty</groupId>
   <artifactId>jetty-webapp</artifactId>
   <version>9.4.1.v20170120</version>
</dependency>
<dependency>
   <groupId>org.eclipse.jetty</groupId>
   <artifactId>jetty-annotations</artifactId>
   <version>9.4.1.v20170120</version>
</dependency>
<dependency>
   <groupId>org.eclipse.jetty.websocket</groupId>
   <artifactId>javax-websocket-server-impl</artifactId>
   <version>9.4.1.v20170120</version>
</dependency>

服务器端点：

  @ServerEndpoint(value = "/ws/communication/{officeId}/{username}/{oldWSSession}")
  class WSCommunication {
     // @OnOpen, @OnMessage, @OnClose methods
  }

Jetty 服务器、Webapp 上下文、Websocket 配置：

  // Jetty server
  Server server = new Server();
  String[] configFiles = {"./etc/jetty.xml"};
  for (String configFile : configFiles) {
     XmlConfiguration configuration = new XmlConfiguration(new File(configFile).toURI().toURL());
     configuration.configure(server);

     Connector[] connectors =  server.getConnectors();
     if (connectors != null && connectors.length == 2) {
        ServerConnector serverConnector = (ServerConnector) connectors[1];
        serverConnector.setPort(8443);
     }
   }

   // Webapp context
   WebAppContext webContext = new WebAppContext(ResourceManager.getWebappsPath(), "/myContext");
   webContext.setContextPath("/myContext");
   webContext.setResourceBase(ResourceManager.getWebappsPath() + contextPath);
   webContext.setInitParameter("org.eclipse.jetty.servlet.Default.dirAllowed", "false");

   private List<WebAppContext> listWebContext = new ArrayList<>();
   listWebContext.add(webContext);

   ContextHandlerCollection contexts = new ContextHandlerCollection();
   contexts.setHandlers(listWebContext.toArray(new WebAppContext[listWebContext.size()]));
   server.setHandler(contexts);

   // Start server
   server.start();

   // Websocket
   ServerContainer container =
   WebSocketServerContainerInitializer.configureContext(webContext);
   container.addEndpoint(webContext.getClassLoader().loadClass(
                         "com.example.WSCommunication"));

   container.setDefaultMaxSessionIdleTimeout(84600);

   // Dump server log
   server.dumpStdErr();

转储：

 org.eclipse.jetty.server.Server@5ca13457 - STARTED
       += qtp348159759{STARTED,10<=19<=200,i=1,q=0} - STARTED
       |   +- 30 qtp348159759-30 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 31 qtp348159759-31-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 89 qtp348159759-89-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 85 qtp348159759-85-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 33 qtp348159759-33-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 36 qtp348159759-36 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 35 qtp348159759-35-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 90 qtp348159759-90-acceptor-0@6a934d20-ServerConnector@31de14e{SSL,[ssl, http/1.1]}{0.0.0.0:8443} RUNNABLE @ sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) prio=3
       |   +- 84 qtp348159759-84 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 86 qtp348159759-86 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 38 qtp348159759-38-acceptor-0@21398b5e-ServerConnector@52bab8e{HTTP/1.1,[http/1.1]}{0.0.0.0:8080} RUNNABLE @ sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) prio=3
       |   +- 87 qtp348159759-87-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 92 qtp348159759-92 TIMED_WAITING @ sun.misc.Unsafe.park(Native Method) IDLE
       |   +- 32 qtp348159759-32 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 34 qtp348159759-34 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 88 qtp348159759-88 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 39 qtp348159759-39 RUNNABLE @ sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
  |   +- 37 qtp348159759-37-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- 83 qtp348159759-83-lowPrioritySelector BLOCKED @ org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:244) prio=1
       |   +- jobs
       += org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@1ca4b0fd - STARTED
       |   +- sun.misc.Unsafe.park(Native Method)
       |   +- java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
       |   +- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
       |   +- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
       |   +- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
       |   +- java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
       |   +- java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
       |   +- java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
       |   +- java.lang.Thread.run(Thread.java:745)
       += ServerConnector@52bab8e{HTTP/1.1,[http/1.1]}{0.0.0.0:8080} - STARTED
       |   +~ org.eclipse.jetty.server.Server@5ca13457 - STARTED
       |   +~ qtp348159759{STARTED,10<=19<=200,i=1,q=0} - STARTED
       |   +~ org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@1ca4b0fd - STARTED
       |   +- org.eclipse.jetty.io.ArrayByteBufferPool@4f751fc9
       |   += HttpConnectionFactory@30bf9c09[HTTP/1.1] - STARTED
       |   |   +- HttpConfiguration@248e9950{32768/8192,8192/8192,https://:8443,[]}
       |   += org.eclipse.jetty.server.ServerConnector$ServerConnectorManager@282048ea - STARTED
       |   |   += org.eclipse.jetty.io.ManagedSelector@65c05e53 id=0 keys=0 selected=0 id=0
       |   |   |   +- sun.nio.ch.KQueueSelectorImpl@6724bccb keys=0
       |   |   += org.eclipse.jetty.io.ManagedSelector@1fa04d47 id=1 keys=0 selected=0 id=1
       |   |   |   +- sun.nio.ch.KQueueSelectorImpl@5fcb5753 keys=0
       |   |   += org.eclipse.jetty.io.ManagedSelector@7999a7f0 id=2 keys=0 selected=0 id=2
       |   |   |   +- sun.nio.ch.KQueueSelectorImpl@3abe8266 keys=0
       |   |   += org.eclipse.jetty.io.ManagedSelector@6d2e80a1 id=3 keys=0 selected=0 id=3
       |   |       +- sun.nio.ch.KQueueSelectorImpl@2e5f2aae keys=0
       |   +- sun.nio.ch.ServerSocketChannelImpl[/0:0:0:0:0:0:0:0:8080]
       |   +- qtp348159759-38-acceptor-0@21398b5e-ServerConnector@52bab8e{HTTP/1.1,[http/1.1]}{0.0.0.0:8080}
       += ServerConnector@31de14e{SSL,[ssl, http/1.1]}{0.0.0.0:8443} - STARTED
       |   +~ org.eclipse.jetty.server.Server@5ca13457 - STARTED
       |   +~ qtp348159759{STARTED,10<=20<=200,i=2,q=0} - STARTED
       |   +~ org.eclipse.jetty.util.thread.ScheduledExecutorScheduler@1ca4b0fd - STARTED
       |   +- org.eclipse.jetty.io.ArrayByteBufferPool@3838889e
       |   += SslConnectionFactory@7b040213{SSL->http/1.1} - STARTED
       |   |   += SslContextFactory@a3ac71d(file:///workspace/myApp/myApp-server/webapps/conf/iDS.keystore,null) trustAll=false
       |   |       +- Protocol Selections
       |   |       |   +- Enabled (size=3)
       |   |       |   |   +- TLSv1
       |   |       |   |   +- TLSv1.1
       |   |       |   |   +- TLSv1.2
       |   |       |   +- Disabled (size=2)
       |   |       |       +- SSLv2Hello - ConfigExcluded:'SSLv2Hello'
       |   |       |       +- SSLv3 - JreDisabled:java.security, ConfigExcluded:'SSLv3'
       |   |       +- Cipher Suite Selections
       |   |           +- Enabled (size=43)
       |   |           |   [CIPHERS]
       |   |           +- Disabled (size=39)
       |   |               [CIPHERS]
       |   += HttpConnectionFactory@116d58cf[HTTP/1.1] - STARTED
       |   |   +- HttpConfiguration@3ba7eaf0{32768/8192,8192/8192,https://:8443,[SecureRequestCustomizer@229efbd3]}
       |   += org.eclipse.jetty.server.ServerConnector$ServerConnectorManager@14690caf - STARTED
       |   |   += org.eclipse.jetty.io.ManagedSelector@e1ecb28 id=0 keys=0 selected=0 id=0
       |   |   |   +- sun.nio.ch.KQueueSelectorImpl@2edda3f6 keys=0
       |   |   += org.eclipse.jetty.io.ManagedSelector@aea4071 id=1 keys=0 selected=0 id=1
       |   |   |   +- sun.nio.ch.KQueueSelectorImpl@2482929a keys=0
       |   |   += org.eclipse.jetty.io.ManagedSelector@5fff729c id=2 keys=0 selected=0 id=2
       |   |   |   +- sun.nio.ch.KQueueSelectorImpl@7f0a5bb3 keys=0
       |   |   += org.eclipse.jetty.io.ManagedSelector@32f11b8 id=3 keys=0 selected=0 id=3
       |   |       +- sun.nio.ch.KQueueSelectorImpl@153f56b1 keys=0
       |   +- sun.nio.ch.ServerSocketChannelImpl[/0:0:0:0:0:0:0:0:8443]
       |   +- qtp348159759-90-acceptor-0@6a934d20-ServerConnector@31de14e{SSL,[ssl, http/1.1]}{0.0.0.0:8443}
       += org.eclipse.jetty.server.handler.ContextHandlerCollection@7b10dd7e[o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}, o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}] - STARTED
       |   += o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps} - STARTED
       |   |   += org.eclipse.jetty.server.session.SessionHandler589427621==dftMaxIdleSec=1800 - STARTED
       |   |   |   += org.eclipse.jetty.security.ConstraintSecurityHandler@76e1ecf - STARTED
       |   |   |   |   +- org.eclipse.jetty.security.DefaultAuthenticatorFactory@7cb77d4b
       |   |   |   |   += org.eclipse.jetty.servlet.ServletHandler@1b1b48e - STARTED
       |   |   |   |   |   += org.eclipse.jetty.servlet.ListenerHolder@2da1d3c6 - STARTED
       |   |   |   |   |   += org.eclipse.jetty.servlet.ListenerHolder@5ace38db - STARTED
       |   |   |   |   |   += default@5c13d641==org.eclipse.jetty.servlet.DefaultServlet,jsp=null,order=0,inst=true - STARTED
       |   |   |   |   |   |   +- aliases=false
       |   |   |   |   |   |   +- dirAllowed=true
       |   |   |   |   |   |   +- maxCacheSize=256000000
       |   |   |   |   |   |   +- maxCachedFileSize=200000000
       |   |   |   |   |   |   +- welcomeServlets=false
       |   |   |   |   |   |   +- useFileMappedBuffer=true
       |   |   |   |   |   |   +- acceptRanges=true
       |   |   |   |   |   |   +- etags=false
       |   |   |   |   |   |   +- maxCachedFiles=2048
       |   |   |   |   |   |   +- redirectWelcome=false
       |   |   |   |   |   += jsp@19c47==org.eclipse.jetty.jsp.JettyJspServlet,jsp=null,order=0,inst=true - STARTED
       |   |   |   |   |   |   +- fork=false
       |   |   |   |   |   |   +- compilerSourceVM=1.7
       |   |   |   |   |   |   +- logVerbosityLevel=DEBUG
       |   |   |   |   |   |   +- compilerTargetVM=1.7
       |   |   |   |   |   |   +- scratchdir=/private/var/folders/8p/f__1hb6j0p5bq7ljqdkjg35h0000gn/T/jetty-0.0.0.0-8080-myContext-_myContext-any-6227228818832412481.dir/jsp
       |   |   |   |   |   |   +- xpoweredBy=false
       |   |   |   |   |   +- [/]=>default
       |   |   |   |   |   +- [*.jsp, *.jspf, *.jspx, *.xsp, *.JSP, *.JSPF, *.JSPX, *.XSP]=>jsp
       |   |   |   |   |   += org.eclipse.jetty.servlet.ListenerHolder@1dd44bec - STARTED
       |   |   |   |   |   += org.eclipse.jetty.servlet.ListenerHolder@114d991c - STARTED
       |   |   |   |   |   += ISSSecurityFilter - STARTED
       |   |   |   |   |   += GzipFilter - STARTED
       |   |   |   |   |   |   +- mimeTypes=text/plain,text/html,text/css,application/javascript,application/x-javascript,application/json
       |   |   |   |   |   += Dashboard@38fd0a74==com.example.web.Dashboard,jsp=null,order=1,inst=true - STARTED
       |   |   |   |   |   |   +- parameter=value
       |   |   |   |   |   += idental-mvc@441f8928==org.springframework.web.servlet.DispatcherServlet,jsp=null,order=-1,inst=false - STARTED
       |   |   |   |   |   [SERVLET MAPPING]
       |   |   |   |   |   +~ Jetty_WebSocketUpgradeFilter - STARTED
       |   |   |   |   |   +- [/*]/[]==1=>Jetty_WebSocketUpgradeFilter
  |   |   |   |   |
  |   |   |   |   +> null
  |   |   |   |   +> null
  |   |   |   |   +> null
  |   |   |   |   +> []
  |   |   |   |   +> /*={*={RoleInfo[],Confidential}}
  |   |   |   |   +> /={TRACE={RoleInfo,F,C[],None}, TRACE.omission={RoleInfo[],None}}
  |   |   |   +~ com.example.web.ContextListener@32d15710
  |   |   |   += org.eclipse.jetty.server.session.DefaultSessionCache@19f2b971[evict=-1,removeUnloadable=false,saveOnCreate=false,saveOnInactiveEvict=false] - STARTED
  |   |   |   |   += org.eclipse.jetty.server.session.NullSessionDataStore@26c61a88[passivating=false,graceSec=3600] - STARTED
  |   |   |   +~ org.eclipse.jetty.server.session.DefaultSessionIdManager@5bbef235[worker=node0] - STARTED
  |   |   += org.eclipse.jetty.servlet.ErrorPageErrorHandler@636f4785 - STARTED
  |   |   +~ org.eclipse.jetty.websocket.jsr356.server.ServerContainer@6fda53a8 - STOPPED
  |   |   |
  |   |   +> WebAppClassLoader=myContext@27e16098
  |   |   |   [LIBS]
  |   |   |   +- sun.misc.Launcher$AppClassLoader@18b4aac2
  |   |   +> Systemclasses o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}
  |   |   |   +- java.
  |   |   |   +- javax.
  |   |   |   +- org.eclipse.jetty.continuation.
  |   |   |   +- org.eclipse.jetty.jaas.
  |   |   |   +- org.eclipse.jetty.jmx.
  |   |   |   +- org.eclipse.jetty.jndi.
  |   |   |   +- org.eclipse.jetty.jsp.JettyJspServlet
  |   |   |   +- org.eclipse.jetty.servlet.DefaultServlet
  |   |   |   +- org.eclipse.jetty.servlets.PushCacheFilter
  |   |   |   +- org.eclipse.jetty.servlets.PushSessionCacheFilter
  |   |   |   +- org.eclipse.jetty.util.annotation.
  |   |   |   +- org.eclipse.jetty.util.log.
  |   |   |   +- org.eclipse.jetty.websocket.
  |   |   |   +- org.w3c.
  |   |   |   +- org.xml.
  |   |   +> Serverclasses o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}
  |   |   |   +- -org.eclipse.jetty.alpn.
  |   |   |   +- -org.eclipse.jetty.apache.
  |   |   |   +- -org.eclipse.jetty.continuation.
  |   |   |   +- -org.eclipse.jetty.jaas.
  |   |   |   +- -org.eclipse.jetty.jmx.
  |   |   |   +- -org.eclipse.jetty.jndi.
  |   |   |   +- -org.eclipse.jetty.jsp.
  |   |   |   +- -org.eclipse.jetty.server.session.SessionData
  |   |   |   +- -org.eclipse.jetty.servlet.DefaultServlet
  |   |   |   +- -org.eclipse.jetty.servlet.NoJspServlet
  |   |   |   +- -org.eclipse.jetty.servlet.listener.
  |   |   |   +- -org.eclipse.jetty.servlets.
  |   |   |   +- -org.eclipse.jetty.util.annotation.
  |   |   |   +- -org.eclipse.jetty.util.log.
  |   |   |   +- -org.eclipse.jetty.websocket.
  |   |   |   +- org.eclipse.jdt.
  |   |   |   +- org.eclipse.jetty.
  |   |   |   +- org.objectweb.asm.
  |   |   +> Configurations o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}
  |   |   |   +- org.eclipse.jetty.webapp.WebInfConfiguration@795e1681
  |   |   |   +- org.eclipse.jetty.webapp.WebXmlConfiguration@55dd7cc5
  |   |   |   +- org.eclipse.jetty.webapp.MetaInfConfiguration@4c174a94
  |   |   |   +- org.eclipse.jetty.webapp.FragmentConfiguration@71ed07ad
  |   |   |   +- org.eclipse.jetty.webapp.JettyWebXmlConfiguration@780efd0f
  |   |   +> Handler attributes o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}
  |   |   |   +- javax.servlet.context.tempdir=/private/var/folders/8p/f__1hb6j0p5bq7ljqdkjg35h0000gn/T/jetty-0.0.0.0-8080-myContext-_myContext-any-6227228818832412481.dir
  |   |   |   +- org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.SCI=WebSocketUpgradeFilter[configuration=org.eclipse.jetty.websocket.server.NativeWebSocketConfiguration@468b9d9f]
  |   |   |   +- org.eclipse.jetty.server.Executor=qtp348159759{STARTED,10<=20<=200,i=2,q=0}
  |   |   |   +- org.apache.catalina.jsp_classpath=[LIBS]
  |   |   |   +- javax.websocket.server.ServerContainer=org.eclipse.jetty.websocket.jsr356.server.ServerContainer@6fda53a8
  |   |   +> Context attributes o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}
  |   |   |   +- org.eclipse.jetty.util.DecoratedObjectFactory=org.eclipse.jetty.util.DecoratedObjectFactory[decorators=1]
  |   |   |   +- com.sun.jsp.tagFileJarUrlsCache={}
  |   |   |   +- org.springframework.web.context.support.ServletContextScope=org.springframework.web.context.support.ServletContextScope@30be2c30
  |   |   |   +- org.springframework.web.context.WebApplicationContext.ROOT=Root WebApplicationContext: startup date [Thu Mar 02 22:05:59 ICT 2017]; root of context hierarchy
  |   |   |   +- resourceCache=ResourceCache[null,org.eclipse.jetty.servlet.DefaultServlet@297785e5]@647951169
  |   |   |   +- org.eclipse.jetty.websocket.server.NativeWebSocketConfiguration=org.eclipse.jetty.websocket.server.NativeWebSocketConfiguration@468b9d9f
  |   |   |   +- org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter=WebSocketUpgradeFilter[configuration=org.eclipse.jetty.websocket.server.NativeWebSocketConfiguration@468b9d9f]
  |   |   |   +- com.sun.jsp.taglibraryCache={}
  |   |   +> Initparams o.e.j.w.WebAppContext@3e778e26{/myContext,file:///workspace/myApp/myApp-server/webapps/myContext/,AVAILABLE}{/workspace/myApp/myApp-server/webapps}
  |   |       +- contextConfigLocation=classpath:applicationContext.xml
  |   |       +- org.eclipse.jetty.servlet.Default.dirAllowed=false
  |   += o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data} - STARTED
  |       += org.eclipse.jetty.server.session.SessionHandler1013179752==dftMaxIdleSec=1800 - STARTED
  |       |   += org.eclipse.jetty.security.ConstraintSecurityHandler@7dfd9178 - STARTED
  |       |   |   +- org.eclipse.jetty.security.DefaultAuthenticatorFactory@68b06b8f
  |       |   |   += org.eclipse.jetty.servlet.ServletHandler@39e59923 - STARTED
  |       |   |   |   += org.eclipse.jetty.servlet.ListenerHolder@1a8e73d2 - STARTED
  |       |   |   |   += org.eclipse.jetty.servlet.ListenerHolder@b6957aa - STARTED
  |       |   |   |   += default@5c13d641==org.eclipse.jetty.servlet.DefaultServlet,jsp=null,order=0,inst=true - STARTED
  |       |   |   |   |   +- aliases=false
  |       |   |   |   |   +- dirAllowed=true
  |       |   |   |   |   +- maxCacheSize=256000000
  |       |   |   |   |   +- maxCachedFileSize=200000000
  |       |   |   |   |   +- welcomeServlets=false
  |       |   |   |   |   +- useFileMappedBuffer=true
  |       |   |   |   |   +- acceptRanges=true
  |       |   |   |   |   +- etags=false
  |       |   |   |   |   +- maxCachedFiles=2048
  |       |   |   |   |   +- redirectWelcome=false
  |       |   |   |   += jsp@19c47==org.eclipse.jetty.jsp.JettyJspServlet,jsp=null,order=0,inst=true - STARTED
  |       |   |   |   |   +- fork=false
  |       |   |   |   |   +- compilerSourceVM=1.7
  |       |   |   |   |   +- logVerbosityLevel=DEBUG
  |       |   |   |   |   +- compilerTargetVM=1.7
  |       |   |   |   |   +- scratchdir=/private/var/folders/8p/f__1hb6j0p5bq7ljqdkjg35h0000gn/T/jetty-0.0.0.0-8080-my_persistent-_myContext_persistent-any-707911495794918084.dir/jsp
  |       |   |   |   |   +- xpoweredBy=false
  |       |   |   |   +- [/]=>default
  |       |   |   |   +- [*.jsp, *.jspf, *.jspx, *.xsp, *.JSP, *.JSPF, *.JSPX, *.XSP]=>jsp
  |       |   |   |
  |       |   |   +> null
  |       |   |   +> null
  |       |   |   +> null
  |       |   |   +> []
  |       |   |   +> /={TRACE={RoleInfo,F,C[],None}, TRACE.omission={RoleInfo[],None}}
  |       |   += org.eclipse.jetty.server.session.DefaultSessionCache@606eb95b[evict=-1,removeUnloadable=false,saveOnCreate=false,saveOnInactiveEvict=false] - STARTED
  |       |   |   += org.eclipse.jetty.server.session.NullSessionDataStore@755718f4[passivating=false,graceSec=3600] - STARTED
  |       |   +~ org.eclipse.jetty.server.session.DefaultSessionIdManager@5bbef235[worker=node0] - STARTED
  |       += org.eclipse.jetty.servlet.ErrorPageErrorHandler@1c2ee56f - STARTED
  |       |
  |       +> WebAppClassLoader=1053927516@3ed1a85c
  |       |   +- sun.misc.Launcher$AppClassLoader@18b4aac2
  |       +> Systemclasses o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}
  |       |   +- java.
  |       |   +- javax.
  |       |   +- org.eclipse.jetty.continuation.
  |       |   +- org.eclipse.jetty.jaas.
  |       |   +- org.eclipse.jetty.jmx.
  |       |   +- org.eclipse.jetty.jndi.
  |       |   +- org.eclipse.jetty.jsp.JettyJspServlet
  |       |   +- org.eclipse.jetty.servlet.DefaultServlet
  |       |   +- org.eclipse.jetty.servlets.PushCacheFilter
  |       |   +- org.eclipse.jetty.servlets.PushSessionCacheFilter
  |       |   +- org.eclipse.jetty.util.annotation.
  |       |   +- org.eclipse.jetty.util.log.
  |       |   +- org.eclipse.jetty.websocket.
  |       |   +- org.w3c.
  |       |   +- org.xml.
  |       +> Serverclasses o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}
  |       |   +- -org.eclipse.jetty.alpn.
  |       |   +- -org.eclipse.jetty.apache.
  |       |   +- -org.eclipse.jetty.continuation.
  |       |   +- -org.eclipse.jetty.jaas.
  |       |   +- -org.eclipse.jetty.jmx.
  |       |   +- -org.eclipse.jetty.jndi.
  |       |   +- -org.eclipse.jetty.jsp.
  |       |   +- -org.eclipse.jetty.server.session.SessionData
  |       |   +- -org.eclipse.jetty.servlet.DefaultServlet
  |       |   +- -org.eclipse.jetty.servlet.NoJspServlet
  |       |   +- -org.eclipse.jetty.servlet.listener.
  |       |   +- -org.eclipse.jetty.servlets.
  |       |   +- -org.eclipse.jetty.util.annotation.
  |       |   +- -org.eclipse.jetty.util.log.
  |       |   +- -org.eclipse.jetty.websocket.
  |       |   +- org.eclipse.jdt.
  |       |   +- org.eclipse.jetty.
  |       |   +- org.objectweb.asm.
  |       +> Configurations o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}
  |       |   +- org.eclipse.jetty.webapp.WebInfConfiguration@5d3b3547
  |       |   +- org.eclipse.jetty.webapp.WebXmlConfiguration@488aebda
  |       |   +- org.eclipse.jetty.webapp.MetaInfConfiguration@5d7da87
  |       |   +- org.eclipse.jetty.webapp.FragmentConfiguration@6eb942cf
  |       |   +- org.eclipse.jetty.webapp.JettyWebXmlConfiguration@6a2cd352
  |       +> Handler attributes o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}
  |       |   +- javax.servlet.context.tempdir=/private/var/folders/8p/f__1hb6j0p5bq7ljqdkjg35h0000gn/T/jetty-0.0.0.0-8080-my_persistent-_myContext_persistent-any-707911495794918084.dir
  |       |   +- org.eclipse.jetty.server.Executor=qtp348159759{STARTED,10<=20<=200,i=2,q=0}
  |       +> Context attributes o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}
  |       |   +- org.eclipse.jetty.util.DecoratedObjectFactory=org.eclipse.jetty.util.DecoratedObjectFactory[decorators=1]
  |       |   +- com.sun.jsp.tagFileJarUrlsCache={}
  |       |   +- resourceCache=ResourceCache[null,org.eclipse.jetty.servlet.DefaultServlet@756731f6]@1323290175
  |       |   +- com.sun.jsp.taglibraryCache={}
  |       +> Initparams o.e.j.w.WebAppContext@2974d7ef{/myContext_persistent,file:///workspace/myApp/myApp-server/data/my_persistent/,AVAILABLE}{/workspace/myApp/myApp-server/data}
  |           +- org.eclipse.jetty.servlet.Default.dirAllowed=false
  += org.eclipse.jetty.server.handler.ErrorHandler@6ad45211 - STARTED
  +- {}
  +- {}
  +- {}
  += org.eclipse.jetty.server.session.DefaultSessionIdManager@5bbef235[worker=node0] - STARTED
  |   += org.eclipse.jetty.server.session.HouseKeeper@666eba5a[interval=600000, ownscheduler=false] - STARTED
  |
  +> sun.misc.Launcher$AppClassLoader@18b4aac2
      [LIBS]
      +- sun.misc.Launcher$ExtClassLoader@fae8daf

以上代码适用于 Jetty 9.1.5.v20140505 和 Java 7，但是当我升级到 Jetty 9.4.1.v20170120 和 Java 8 时失败。浏览器控制台报告 404 错误。

WebSocket connection to 'wss://localhost:8443/myContext/ws/communication/5/kbui/None' failed: Unexpected response code: 404

升级 Jetty 时我错过了什么吗？
提前致谢。

Answer 1

从您的设置来看，您最终会...

wss://localhost:8443/myContext/ws/communication/5/kbui/None

您的 contextPath 不是 /context，它实际上是 /myContext 在您的设置中。

您删除了转储中的 Servlet 映射部分（这是重要的部分。呵呵）

但是尝试从 WebAppClassloader 或 WebApp 的 ServletContext 外部手动添加 WebAppContext 中包含的 WSCommunication 端点也可能会成为问题。

您有 3 个选项：

JSR356自动方式

为您的 WebAppContext 设置字节码扫描和注释发现，让启动发现并自动加载 WSCommunication 端点。

将以下内容添加到您的 webContext ...

webContext.setAttribute("org.eclipse.jetty.websocket.jsr356",Boolean.TRUE);

webContext.setConfigurations(new Configuration[] {
            new AnnotationConfiguration(),
            new WebXmlConfiguration(),
            new WebInfConfiguration(),
            new PlusConfiguration(), 
            new MetaInfConfiguration(),
            new FragmentConfiguration(), 
            new EnvConfiguration()});

并将 jetty-annotations 依赖项添加到您的项目中。

JSR356手动方式

使用 javax.websocket.server.ServerApplicationConfig 报告 WSCommunication 可从 webapp 的启动中添加。
Servlet 规范手动方式

这是最简单的方法。创建一个 javax.servlet.ServletContextListener，将 WSCommunication 端点添加到 ServerContainer

public class MyContextListener implements ServletContextListener
{
    @Override
    public void contextDestroyed(ServletContextEvent sce)
    {
    }

    @Override
    public void contextInitialized(ServletContextEvent sce)
    {
        ServerContainer container = (ServerContainer)sce.getServletContext()
                   .getAttribute(ServerContainer.class.getName());

        try
        {
            container.addEndpoint(WSCommunication.class);
        }
        catch (DeploymentException e)
        {
            throw new RuntimeException("Unable to add endpoint",e);
        }
    }
}

Websocket JSR-356 使用 Jetty 9.4.1 失败

Websocket JSR-356 fail with Jetty 9.4.1

embedded-jetty

websocket

jetty-9

jsr356