我已经用Spring 4开发了一个实时通知系统。该代码可在Github上获得：Github.com/vdenotaris/Spring Messaging
在我的客户端上，我使用如下脚本定义了WebSocket连接：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Hello World!</title>
<script src="/static/assets/js/stomp.min.js"></script>
<script src="http://cdn.sockjs.org/sockjs-0.3.min.js"></script>
<script>
var stompClient = null;
function setConnected(connected) {
document.getElementById('connect').disabled = connected;
document.getElementById('disconnect').disabled = !connected;
document.getElementById('conversationDiv').style.visibility = connected ? 'visible' : 'hidden';
document.getElementById('response').innerHTML = '';
}
function connect() {
var socket = new SockJS('/notifications');
stompClient = Stomp.over(socket);
stompClient.connect({}, function(frame) {
setConnected(true);
console.log('Connected: ' + frame);
stompClient.subscribe('/queue/lrt-update', function(message){
showMessage(message.body);
});
stompClient.subscribe('/user/queue/lrt-update', function(message){
showMessage(message.body);
});
});
}
function disconnect() {
stompClient.disconnect();
setConnected(false);
console.log("Disconnected");
}
function showMessage(message) {
var response = document.getElementById('response');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.appendChild(document.createTextNode(message));
response.appendChild(p);
}
</script>
</head>
<body>
<div>
<button id="connect" onclick="connect();">Connect</button>
<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
</div>
<div id="conversationDiv">
<p id="response"></p>
</div>
</body>
</html>
如果我通过按下Disconnect按钮关闭连接，一切都很好，但如果我通过浏览器退出整个页面，应用程序后端会抛出一些异常：
java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: An established connection was aborted by the software in your host machine
at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:243)
at org.apache.tomcat.websocket.WsSession.sendCloseMessage(WsSession.java:487)
at org.apache.tomcat.websocket.WsSession.onClose(WsSession.java:441)
at org.apache.tomcat.websocket.WsFrameBase.processDataControl(WsFrameBase.java:324)
at org.apache.tomcat.websocket.WsFrameBase.processData(WsFrameBase.java:270)
at org.apache.tomcat.websocket.WsFrameBase.processInputBuffer(WsFrameBase.java:116)
at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:54)
at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler$WsReadListener.onDataAvailable(WsHttpUpgradeHandler.java:194)
at org.apache.coyote.http11.upgrade.AbstractServletInputStream.onDataAvailable(AbstractServletInputStream.java:189)
at org.apache.coyote.http11.upgrade.AbstractProcessor.upgradeDispatch(AbstractProcessor.java:92)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:605)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1720)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.util.concurrent.ExecutionException: java.io.IOException: An established connection was aborted by the software in your host machine
at org.apache.tomcat.websocket.FutureToSendHandler.get(FutureToSendHandler.java:102)
at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:238)
... 16 common frames omitted
Caused by: java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
at sun.nio.ch.IOUtil.write(IOUtil.java:65)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:487)
at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:123)
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:185)
at org.apache.coyote.http11.upgrade.NioServletOutputStream.doWriteInternal(NioServletOutputStream.java:93)
at org.apache.coyote.http11.upgrade.NioServletOutputStream.doWrite(NioServletOutputStream.java:60)
at org.apache.coyote.http11.upgrade.AbstractServletOutputStream.writeInternal(AbstractServletOutputStream.java:125)
at org.apache.coyote.http11.upgrade.AbstractServletOutputStream.write(AbstractServletOutputStream.java:92)
at org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer.onWritePossible(WsRemoteEndpointImplServer.java:94)
at org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer.doWrite(WsRemoteEndpointImplServer.java:81)
at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.writeMessagePart(WsRemoteEndpointImplBase.java:393)
at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessage(WsRemoteEndpointImplBase.java:287)
at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:233)
... 16 common frames omitted
我该怎么修？
注意：我使用Tomcat 7作为应用程序服务器。
我也收到了同样的错误。我使用的是websocket服务器的tomcat实现。我可以通过对onError:传递的错误调用.getMessage（）来消除错误
@OnError
public void onError(Throwable error)
{
Logger.getLogger(MyServer.class.getName()).log(Level.SEVERE, null, error.getMessage());
}
如果我像这样删除.getMessage调用：
Logger.getLogger(MyServer.class.getName()).log(Level.SEVERE, null, error);
出现错误。调用.getMessage（），错误就会消失。
我遇到了同样的问题，尽管它不会损害实际功能。我在端点类中添加了一个带有注释@OnError的方法，这解决了我的问题
@OnError
public void onError(Throwable error) {
}