没有互联网访问就没有 Websocket 连接 (Ubuntu)
No Websocket connection without internet access (Ubuntu)
我有一个 Spring 启动应用程序，它实现了一个 Websocket 服务器 (SockJS)。
只要托管应用程序的 Ubuntu 机器可以访问互联网，我就可以在我的本地网络上将客户端连接到该服务器。
2016-10-27 11:22:20.802 DEBUG 9390 --- [nio-8085-exec-9] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@6cb31793:org.apache.tomcat.util.net.NioChannel@231c3b0c:java.nio.channels.SocketChannel[connected local=/192.168.1.104:8085 remote=/192.168.1.106:51946]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:22:20.849 DEBUG 9390 --- [io-8085-exec-10] d.f.util.ConnectivityCheckUtil : Local network interface found: wlp2s0 192.168.1.104
2016-10-27 11:22:20.850 DEBUG 9390 --- [io-8085-exec-10] d.f.util.ConnectivityCheckUtil : Your ip is: 192.168.1.104
2016-10-27 11:22:20.850 DEBUG 9390 --- [io-8085-exec-10] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : Connected ... t0obkpdo
2016-10-27 11:22:20.851 INFO 9390 --- [io-8085-exec-10] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : websocketTextmessagesize = 1000000
2016-10-27 11:22:20.852 DEBUG 9390 --- [io-8085-exec-10] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@1648207f:org.apache.tomcat.util.net.NioChannel@231c3b0c:java.nio.channels.SocketChannel[connected local=192.168.1.104/192.168.1.104:8085 remote=/192.168.1.106:51947]], Status in: [OPEN_READ], State out: [UPGRADING]
2016-10-27 11:22:20.852 DEBUG 9390 --- [io-8085-exec-10] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@1648207f:org.apache.tomcat.util.net.NioChannel@231c3b0c:java.nio.channels.SocketChannel[connected local=192.168.1.104/192.168.1.104:8085 remote=/192.168.1.106:51947]], Status in: [OPEN_READ], State out: [UPGRADED]
当我拔下网络路由器上的 WAN 插头时，服务器会断开所有 WS 连接并且不允许新的连接。客户端会报错码2000'All transports failed'.
服务器会抛出这个错误：
2016-10-27 11:18:38.380 DEBUG 9390 --- [nio-8085-exec-1] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@5526ea03:org.apache.tomcat.util.net.NioChannel@5f9486ff:java.nio.channels.SocketChannel[closed]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:18:51.396 DEBUG 9390 --- [nio-8085-exec-2] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@d05fac1:org.apache.tomcat.util.net.NioChannel@5f9486ff:java.nio.channels.SocketChannel[connected local=/192.168.1.104:8085 remote=/192.168.1.106:51692]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:19:01.437 DEBUG 9390 --- [nio-8085-exec-6] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@7f10c230:org.apache.tomcat.util.net.NioChannel@5f9486ff:java.nio.channels.SocketChannel[connected local=192.168.1.104/192.168.1.104:8085 remote=/192.168.1.106:51693]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:19:02.141 DEBUG 9390 --- [nio-8085-exec-3] d.f.util.ConnectivityCheckUtil : Local network interface found: wlp2s0 192.168.1.104
2016-10-27 11:19:02.142 DEBUG 9390 --- [nio-8085-exec-3] d.f.util.ConnectivityCheckUtil : Your ip is: 192.168.1.104
2016-10-27 11:19:02.144 DEBUG 9390 --- [nio-8085-exec-3] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : Connected ... 2cbhftw3
2016-10-27 11:19:02.144 INFO 9390 --- [nio-8085-exec-3] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : websocketTextmessagesize = 1000000
2016-10-27 11:19:02.147 DEBUG 9390 --- [nio-8085-exec-3] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : Session 2cbhftw3 closed because of CloseStatus[code=1011, reason=null]
2016-10-27 11:19:02.149 ERROR 9390 --- [nio-8085-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.socket.sockjs.SockJsException: Uncaught failure in SockJS request, uri=http://192.168.1.104:8085/websocket/data/421/2cbhftw3/xhr_streaming; nested exception is org.springframework.web.socket.sockjs.SockJsTransportFailureException: Failed to open session; nested exception is org.apache.catalina.connector.ClientAbortException: java.io.IOException: Broken pipe] with root cause
java.io.IOException: Broken pipe
只要我重新插入 WAN 电缆并且路由器再次可以访问互联网，WS 连接就会再次开始工作。我已经在 Netgear 和 TP-Link.
的多个路由器上尝试过这个
我已经尝试在 ubuntu 下手动设置网络接口设置，但这没有帮助。
知道是什么原因造成的吗？
BR
丹尼尔
看来您必须设置一个静态 IP，否则系统会根据 wire shark 尝试访问 DNS 发现服务，但它没有找到，只是没有连接到预期的 IP。
刚刚解决了在服务器主机文件中添加一行的相同问题，例如：
appsrv 192.168.1.15
我有一个 Spring 启动应用程序，它实现了一个 Websocket 服务器 (SockJS)。
只要托管应用程序的 Ubuntu 机器可以访问互联网，我就可以在我的本地网络上将客户端连接到该服务器。
2016-10-27 11:22:20.802 DEBUG 9390 --- [nio-8085-exec-9] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@6cb31793:org.apache.tomcat.util.net.NioChannel@231c3b0c:java.nio.channels.SocketChannel[connected local=/192.168.1.104:8085 remote=/192.168.1.106:51946]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:22:20.849 DEBUG 9390 --- [io-8085-exec-10] d.f.util.ConnectivityCheckUtil : Local network interface found: wlp2s0 192.168.1.104 2016-10-27 11:22:20.850 DEBUG 9390 --- [io-8085-exec-10] d.f.util.ConnectivityCheckUtil : Your ip is: 192.168.1.104
2016-10-27 11:22:20.850 DEBUG 9390 --- [io-8085-exec-10] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : Connected ... t0obkpdo 2016-10-27 11:22:20.851 INFO 9390 --- [io-8085-exec-10] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : websocketTextmessagesize = 1000000
2016-10-27 11:22:20.852 DEBUG 9390 --- [io-8085-exec-10] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@1648207f:org.apache.tomcat.util.net.NioChannel@231c3b0c:java.nio.channels.SocketChannel[connected local=192.168.1.104/192.168.1.104:8085 remote=/192.168.1.106:51947]], Status in: [OPEN_READ], State out: [UPGRADING]
2016-10-27 11:22:20.852 DEBUG 9390 --- [io-8085-exec-10] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@1648207f:org.apache.tomcat.util.net.NioChannel@231c3b0c:java.nio.channels.SocketChannel[connected local=192.168.1.104/192.168.1.104:8085 remote=/192.168.1.106:51947]], Status in: [OPEN_READ], State out: [UPGRADED]
当我拔下网络路由器上的 WAN 插头时，服务器会断开所有 WS 连接并且不允许新的连接。客户端会报错码2000'All transports failed'.
服务器会抛出这个错误：
2016-10-27 11:18:38.380 DEBUG 9390 --- [nio-8085-exec-1] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@5526ea03:org.apache.tomcat.util.net.NioChannel@5f9486ff:java.nio.channels.SocketChannel[closed]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:18:51.396 DEBUG 9390 --- [nio-8085-exec-2] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@d05fac1:org.apache.tomcat.util.net.NioChannel@5f9486ff:java.nio.channels.SocketChannel[connected local=/192.168.1.104:8085 remote=/192.168.1.106:51692]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:19:01.437 DEBUG 9390 --- [nio-8085-exec-6] o.a.coyote.http11.Http11NioProtocol : Socket: [org.apache.tomcat.util.net.NioEndpoint$KeyAttachment@7f10c230:org.apache.tomcat.util.net.NioChannel@5f9486ff:java.nio.channels.SocketChannel[connected local=192.168.1.104/192.168.1.104:8085 remote=/192.168.1.106:51693]], Status in: [OPEN_READ], State out: [CLOSED]
2016-10-27 11:19:02.141 DEBUG 9390 --- [nio-8085-exec-3] d.f.util.ConnectivityCheckUtil : Local network interface found: wlp2s0 192.168.1.104
2016-10-27 11:19:02.142 DEBUG 9390 --- [nio-8085-exec-3] d.f.util.ConnectivityCheckUtil : Your ip is: 192.168.1.104
2016-10-27 11:19:02.144 DEBUG 9390 --- [nio-8085-exec-3] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : Connected ... 2cbhftw3
2016-10-27 11:19:02.144 INFO 9390 --- [nio-8085-exec-3] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : websocketTextmessagesize = 1000000
2016-10-27 11:19:02.147 DEBUG 9390 --- [nio-8085-exec-3] d.f.i.v.b.i.w.s.BrokerWebsocketHandler : Session 2cbhftw3 closed because of CloseStatus[code=1011, reason=null]
2016-10-27 11:19:02.149 ERROR 9390 --- [nio-8085-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.socket.sockjs.SockJsException: Uncaught failure in SockJS request, uri=http://192.168.1.104:8085/websocket/data/421/2cbhftw3/xhr_streaming; nested exception is org.springframework.web.socket.sockjs.SockJsTransportFailureException: Failed to open session; nested exception is org.apache.catalina.connector.ClientAbortException: java.io.IOException: Broken pipe] with root cause
java.io.IOException: Broken pipe
只要我重新插入 WAN 电缆并且路由器再次可以访问互联网，WS 连接就会再次开始工作。我已经在 Netgear 和 TP-Link.
的多个路由器上尝试过这个我已经尝试在 ubuntu 下手动设置网络接口设置，但这没有帮助。
知道是什么原因造成的吗？
BR 丹尼尔
看来您必须设置一个静态 IP，否则系统会根据 wire shark 尝试访问 DNS 发现服务，但它没有找到，只是没有连接到预期的 IP。
刚刚解决了在服务器主机文件中添加一行的相同问题，例如：
appsrv 192.168.1.15