我在客户端使用 JavaScript 并在服务器端使用 Java/Tomcat 来实现 Web Socket。它在本地主机上工作得很好,但是当我在我的远程主机上部署时它失败了。检查控制台,Web 套接字请求出现 500 错误。因此我检查服务器错误日志以查看错误并找到 -
java.lang.UnsupportedOperationException: HTTP upgrade is not supported by this protocol
at org.apache.coyote.AbstractProcessor.doHttpUpgrade(AbstractProcessor.java:712) ~[tomcat-coyote.jar:8.5.20]
at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:478) ~[tomcat-coyote.jar:8.5.20]
at org.apache.coyote.Request.action(Request.java:433) ~[tomcat-coyote.jar:8.5.20]
at org.apache.catalina.connector.Request.upgrade(Request.java:2022) ~[catalina.jar:8.5.20]
at org.apache.catalina.connector.RequestFacade.upgrade(RequestFacade.java:1115) ~[catalina.jar:8.5.20]
at org.apache.tomcat.websocket.server.UpgradeUtil.doUpgrade(UpgradeUtil.java:234) ~[tomcat-websocket-8.5.20.jar:8.5.20]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:77) ~[tomcat-websocket-8.5.20.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.20]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.20]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [catalina.jar:8.5.20]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [catalina.jar:8.5.20]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [catalina.jar:8.5.20]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [catalina.jar:8.5.20]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [catalina.jar:8.5.20]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [catalina.jar:8.5.20]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [catalina.jar:8.5.20]
at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:486) [tomcat-coyote.jar:8.5.20]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-coyote.jar:8.5.20]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-coyote.jar:8.5.20]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457) [tomcat-coyote.jar:8.5.20]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-coyote.jar:8.5.20]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_11]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_11]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.5.20]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_11]
我做了一些研究,偶然发现有人遇到了类似的问题,并在这个问题中提出了问题 WebSockets through Apache and Tomcat: HTTP upgrade is not supported by the AJP protocol但是我在共享托管服务器上运行私有(private) tomcat 实例,因此我无法实现该答案中提供的解决方案,因此我联系了我的主机,他们回复了
'在调查您的查询时,我们可以看到按照您电子邮件中提到的步骤更改 tomcat 和 HTTP 设置将影响另一个共享 tomcat 实例的 AJP 连接配置,并且共享 tomcat 实例托管的应用程序将不行。对于重新编译,连接器设置还需要在服务器范围内进行更新,而这不能在共享服务器环境中完成。我们请求您访问以下链接来试用我们的 VPS 计划。”
我认为购买 vps 计划应该是最后的选择。这里有没有人对问题有更有利的解决方案。
最佳答案
在这种情况下,您需要 VPS。我最后购买的是 hetzner,他们提供了 CPU 功能较弱的新计划或类似的东西,所以我以 5.88 美元/月的价格获得 4gb RAM 服务器,2.99 美元获得 1gb
关于javascript - 通过 Apache 和 Tomcat 的 WebSocket 500 错误 : java. lang.UnsupportedOperationException:此协议(protocol)不支持 HTTP 升级,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54254968/