Tomcat上的WebSocket握手返回意外响应代码500

时间：2016-12-07 00:09:24

标签： tomcat jetty java-websocket jsr356

我有一个WebSocket应用程序，它以编程方式注册端点，而不使用Annotations。

相关代码是：

ServerEndpointConfig.Configurator configurator = 
                (ServerEndpointConfig.Configurator)configuratorClass.newInstance();   
ServerEndpointConfig serverEndpointConfig = ServerEndpointConfig.Builder
                .create(endpointClass, endpointPath)
                .configurator(configurator)
                .build();

ServerContainer serverContainer = (ServerContainer)app
                .getServletContext()
                .getAttribute("javax.websocket.server.ServerContainer");
serverContainer.addEndpoint(serverEndpointConfig);

当我在带有嵌入式Jetty容器的IDE中运行时，一切正常，其中依赖是通过Maven在tomcat-websocket和tomcat-websocket-api库上，但是当我在Tomcat（8.5.5）中部署它时，然后尝试建立WebSocket连接，我在浏览器的控制台中收到以下错误：

  

与'ws：//127.0.0.1：8080 / echo'的WebSocket连接失败：   WebSocket握手期间出错：意外响应代码：500

我没有在Catalina输出中记录任何错误或其他信息，我不知道如何调试此问题。

我需要以编程方式配置端点，因为在编译时不知道大部分信息，所以请不要指向我的Annotation解决方案。

我已将日志级别设置为FINE，这是相关的代码段：

T.550 FINE [http-nio-IP-Acceptor-0] o.a.tomcat.util.threads.LimitLatch.countUpOrAwait Counting up[http-nio-IP-Acceptor-0] latch=2
T.551 FINE [http-nio-IP-exec-3] o.a.coyote.AbstractProtocol$ConnectionHandler.process Processing socket [o.a.tomcat.util.net.NioChannel@1e87b268:java.nio.channels.SocketChannel[connected local=/192.168.1.17:8080 remote=/192.168.1.17:51259]] with status [OPEN_READ]
T.551 FINE [http-nio-IP-exec-3] o.a.coyote.http11.Http11InputBuffer.parseRequestLine Received [GET /echo HTTP/1.1
Host: 192.168.1.17:8080
Connection: Upgrade
Pragma: no-cache
Cache-Control: no-cache
Upgrade: websocket
Origin: http://192.168.1.17:8080
Sec-WebSocket-Version: 13
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36
Accept-Encoding: gzip, deflate, sdch
Accept-Language: en-US,en;q=0.8
Cookie: LUCEE_ADMIN_LANG=en; cfid=de1b0016-ad0c-4601-b8ce-ecb47771b9c8; cftoken=0; LUCEE_ADMIN_LASTPAGE=debugging.logs
Sec-WebSocket-Key: Ogg0VPp9O3XZlR8rrgz4Gg==
Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits

]
T.553 FINE [http-nio-IP-exec-3] o.a.tomcat.util.http.Rfc6265CookieProcessor.parseCookieHeader Cookies: Parsing b[]: LUCEE_ADMIN_LANG=en; cfid=de1b0016-ad0c-4601-b8ce-ecb47771b9c8; cftoken=0; LUCEE_ADMIN_LASTPAGE=debugging.logs
T.554 FINE [http-nio-IP-exec-3] o.a.catalina.authenticator.AuthenticatorBase.invoke Security checking request GET /echo
T.554 FINE [http-nio-IP-exec-3] o.a.catalina.realm.RealmBase.findSecurityConstraints   No applicable constraints defined
T.554 FINE [http-nio-IP-exec-3] o.a.catalina.authenticator.AuthenticatorBase.invoke  Not subject to any constraint
T.561 FINE [http-nio-IP-exec-3] o.a.tomcat.util.http.Parameters.setEncoding Set encoding to ISO-8859-1
T.563 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass loadClass(o.a.tomcat.util.collections.LocalStrings, false)
T.563 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass   Delegating to parent classloader1 java.net.URLClassLoader@31befd9f
T.563 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass   Searching local repositories
T.563 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.findClass     findClass(o.a.tomcat.util.collections.LocalStrings)
T.564 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.findClass     --> Returning ClassNotFoundException
T.564 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream getResourceAsStream(org/apache/tomcat/util/collections/LocalStrings.properties)
T.564 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   Delegating to parent classloader java.net.URLClassLoader@31befd9f
T.565 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   Searching local repositories
T.565 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   --> Resource not found, returning null
T.566 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass loadClass(o.a.tomcat.util.collections.LocalStrings_en, false)
T.566 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass   Delegating to parent classloader1 java.net.URLClassLoader@31befd9f
T.567 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass   Searching local repositories
T.567 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.findClass     findClass(o.a.tomcat.util.collections.LocalStrings_en)
T.568 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.findClass     --> Returning ClassNotFoundException
T.569 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream getResourceAsStream(org/apache/tomcat/util/collections/LocalStrings_en.properties)
T.569 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   Delegating to parent classloader java.net.URLClassLoader@31befd9f
T.570 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   Searching local repositories
T.571 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   --> Resource not found, returning null
T.571 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass loadClass(o.a.tomcat.util.collections.LocalStrings_en_US, false)
T.571 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass   Delegating to parent classloader1 java.net.URLClassLoader@31befd9f
T.572 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.loadClass   Searching local repositories
T.572 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.findClass     findClass(o.a.tomcat.util.collections.LocalStrings_en_US)
T.573 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.findClass     --> Returning ClassNotFoundException
T.573 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream getResourceAsStream(org/apache/tomcat/util/collections/LocalStrings_en_US.properties)
T.573 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   Delegating to parent classloader java.net.URLClassLoader@31befd9f
T.574 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   Searching local repositories
T.574 FINE [http-nio-IP-exec-3] o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream   --> Resource not found, returning null
T.581 FINE [http-nio-IP-exec-3] o.a.coyote.AbstractProcessorLight.process Socket: [o.a.tomcat.util.net.NioEndpoint$NioSocketWrapper@6689cfeb:o.a.tomcat.util.net.NioChannel@1e87b268:java.nio.channels.SocketChannel[connected local=/192.168.1.17:8080 remote=/192.168.1.17:51259]], Status in: [OPEN_READ], State out: [CLOSED]
T.582 FINE [http-nio-IP-exec-3] o.a.tomcat.util.threads.LimitLatch.countDown Counting down[http-nio-IP-exec-3] latch=2
T.114 FINE [http-nio-IP-exec-4] o.a.coyote.AbstractProtocol$ConnectionHandler.process Processing socket [o.a.tomcat.util.net.NioChannel@406eaa39:java.nio.channels.SocketChannel[connected local=/192.168.1.17:8080 remote=/192.168.1.17:51254]] with status [ERROR]
T.115 FINE [http-nio-IP-exec-4] o.a.tomcat.util.threads.LimitLatch.countDown Counting down[http-nio-IP-exec-4] latch=1

1 个答案:

答案 0 :(得分：0)

好的，经过多次调试后我发现modifyHandshake（）引发了一个导致此问题的NPE。

即使日志级别设置为FINE，我也很惊讶没有记录到这一点。

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