websocket 自动断开报错 java.io.EOFException 解决办法

た入场券 2023-01-18 02:23 1643阅读 0赞

websocket 服务使用 Nginx 反向代理后，发现会自动断开，查看日志如下

2021-04-30 10:34:02.404 ERROR 153322 --- [nio-8088-exec-7] com.yxc.imapi.core.WebSocketServer : 发生错误：null，Session ID： 1e
    java.io.EOFException
            at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1231)
            at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.read(NioEndpoint.java:1141)
            at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:72)
            at org.apache.tomcat.websocket.server.WsFrameServer.doOnDataAvailable(WsFrameServer.java:171)
            at org.apache.tomcat.websocket.server.WsFrameServer.notifyDataAvailable(WsFrameServer.java:151)
            at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:148)
            at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:54)
            at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:59)
            at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
            at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)
            at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
            at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
            at java.lang.Thread.run(Thread.java:748)

原因：使用了 Nginx 反向代理后，超过60S没有数据传输的连接会自动断开。

解决方法有两个：  
1、修改nginx配置  
proxy\_read\_timeout 默认 60s 断开，修改即可，比如 60 分钟

proxy_read_timeout 3600s;

2、前端或者后端加个定时任务发个心跳包就好了，例如：

//定时任务，由于使用nginx反向代理，60秒无数据传输会断开
    timer=setInterval(function() {
    	if (websocket.readyState == 1) {
    		websocket.send("心跳包检测");
    	} else {
    		//IM连接已断开
    	}
    }, 50 * 1000);