Terminating GWT Comet Session
AgitoM
project I'm currently working on. (For some reason its not an issue in
a other project I build).
I'm using a button on a GUI to disconnect from a GWT Comet session.
The button send a RPC call to the server, and the server executes this
code:
@Override
public void disconnectCometSession() {
HttpSession httpSession = getThreadLocalRequest().getSession(false);
if (httpSession == null) {
System.out.println("No HTTP session available");
}
else {
// check if there is a Comet session setup. In a larger
application the HTTP session may have been
// setup via other means.
CometSession cometSession =
CometServlet.getCometSession(httpSession, false);
if (cometSession == null) {
System.out.println("No Comet session available");
}
// remove the mapping of user name to CometSession
String id = httpSession.getId();
users.remove(id);
}
}
Then on callback, I invoke this code on the client side:
private class DisconnectCallback implements AsyncCallback {
@Override
public void onFailure(Throwable caught) {
// TODO Auto-generated method stub
}
@Override
public void onSuccess(Object result) {
cometClient.stop();
System.out.println("Disconnected 1");
}
}
But for some reason, I get this error a few seconds later:
Starting Jetty on port 8888
[WARN] Error sending heartbeat
org.mortbay.jetty.EofException
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:760)
at org.mortbay.jetty.AbstractGenerator
$Output.flush(AbstractGenerator.java:566)
at org.mortbay.jetty.HttpConnection$Output.flush(HttpConnection.java:
911)
at
net.zschech.gwt.comet.server.deflate.DeflaterOutputStream.flush(DeflaterOutputStream.java:
100)
at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
at
net.zschech.gwt.comet.server.impl.CometServletResponseImpl.flush(CometServletResponseImpl.java:
366)
at
net.zschech.gwt.comet.server.impl.CometServletResponseImpl.heartbeat(CometServletResponseImpl.java:
345)
at
net.zschech.gwt.comet.server.impl.ManagedStreamCometServletResponseImpl.heartbeat(ManagedStreamCometServletResponseImpl.java:
100)
at
net.zschech.gwt.comet.server.impl.BlockingAsyncServlet.suspend(BlockingAsyncServlet.java:
92)
at
net.zschech.gwt.comet.server.impl.CometServletResponseImpl.suspend(CometServletResponseImpl.java:
269)
at
net.zschech.gwt.comet.server.CometServlet.doCometImpl(CometServlet.java:
157)
at net.zschech.gwt.comet.server.CometServlet.doGet(CometServlet.java:
108)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
362)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:
49)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
505)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:829)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
395)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:488)
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:89)
at sun.nio.ch.IOUtil.write(IOUtil.java:46)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:450)
at org.mortbay.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:160)
at
org.mortbay.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:
207)
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:693)
... 32 more
My code is nearly 100% similar to that in a other project. So hope
anyone can provide some insight.
