gwt-comet - CometException: EventSource error

[Magnus]

Hello,

I would like to use "gwt-comet":

http://code.google.com/p/gwt-comet/

To get started, I tested the chat application provided with on the project site:

http://code.google.com/p/gwt-comet/wiki/ChatExample

I also got the example running: It works fine within eclipse and with GWT development mode.

Then, I deployed it as a war file to my tomcat 6 server, and I receive this error repeatedly within the chat window:

error false net.zschech.gwt.comet.client.CometException: EventSource error

Does anyone have an idea what could be the cause?

How are your experiences with gwt-comet?

Thanks

Magnus

[Magnus]

Hi,

here is additional information:

The call failed on the server. See the tomcat log below.

I also found somewhere that the version of gwt-comet relates to the GWT version.

Magnus

-----

Nov 19, 2012 7:30:31 AM org.apache.catalina.core.ApplicationContext log
SEVERE: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract void cometchat.client.svc.ChatService.send(java.lang.String) throws cometchat.client.ChatException' threw an unexpected exception: java.lang.IllegalStateException: CometSession has been invalidated
	at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
	at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalStateException: CometSession has been invalidated
	at net.zschech.gwt.comet.server.impl.CometSessionImpl.ensureValid(CometSessionImpl.java:65)
	at net.zschech.gwt.comet.server.impl.CometSessionImpl.enqueue(CometSessionImpl.java:77)
	at cometchat.server.ChatServiceImpl.send(ChatServiceImpl.java:127)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
	... 17 more
Nov 19, 2012 7:32:49 AM org.apache.catalina.core.ApplicationContext log
SEVERE: Error sending heartbeat
ClientAbortException:  java.net.SocketException: Broken pipe
	at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:319)
	at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:288)
	at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:98)
	at net.zschech.gwt.comet.server.deflate.DeflaterOutputStream.flush(DeflaterOutputStream.java:100)
	at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:278)
	at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122)
	at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212)
	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.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.net.SocketException: Broken pipe
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
	at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
	at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:741)
	at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
	at org.apache.coyote.http11.InternalOutputBuffer.flush(InternalOutputBuffer.java:299)
	at org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:976)
	at org.apache.coyote.Response.action(Response.java:183)
	at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:314)
	... 27 more

[gic...@at.co.ke]

Hi Did you get a solution to this problem i have a similar problem