2013/11/25 Nick Williams <nicho...@nicholaswilliams.net>:
> I've written a simple Servlet/WebSocket client that sends a message over the
> Session each time a GET request comes in. This worked a few months ago:
>
> @Override
> protected void doGet(HttpServletRequest request, HttpServletResponse
> response)
> throws ServletException, IOException
> {
> ClusterMessage message = new ClusterMessage(this.nodeId,
> "request:{ip:\"" + request.getRemoteAddr() +
> "\",queryString:\"" + request.getQueryString() + "\"}");
>
> try(OutputStream output =
> this.session.getBasicRemote().getSendStream();
> ObjectOutputStream stream = new ObjectOutputStream(output))
> {
> stream.writeObject(message);
> }
> response.getWriter().append("OK");
> }
>
> But on the latest trunk, I get this error on the first request to doGet:
>
> java.lang.IllegalStateException: The remote endpoint was in state
> [STREAM_WRITING] which is an invalid state for called method
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase$StateMachine.checkState(WsRemoteEndpointImplBase.java:1014)
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase$StateMachine.binaryPartialStart(WsRemoteEndpointImplBase.java:961)
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendPartialBytes(WsRemoteEndpointImplBase.java:140)
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase$WsOutputStream.doWrite(WsRemoteEndpointImplBase.java:838)
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase$WsOutputStream.flush(WsRemoteEndpointImplBase.java:821)
>
> java.io.ObjectOutputStream$BlockDataOutputStream.flush(ObjectOutputStream.java:1823)
> java.io.ObjectOutputStream.flush(ObjectOutputStream.java:719)
> java.io.ObjectOutputStream.close(ObjectOutputStream.java:740)
> com.wrox.ClusterNodeServlet.doGet(ClusterNodeServlet.java:72)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
>
> On all subsequent requests, I get this error:
>
> java.lang.IllegalStateException: The remote endpoint was in state
> [STREAM_WRITING] which is an invalid state for called method
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase$StateMachine.checkState(WsRemoteEndpointImplBase.java:1014)
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase$StateMachine.streamStart(WsRemoteEndpointImplBase.java:951)
>
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.getSendStream(WsRemoteEndpointImplBase.java:190)
>
> org.apache.tomcat.websocket.WsRemoteEndpointBasic.getSendStream(WsRemoteEndpointBasic.java:62)
> com.wrox.ClusterNodeServlet.doGet(ClusterNodeServlet.java:68)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
>
> I'm guessing I need to file a BZ, but I wanted to make sure. I don't see how
> I could possibly be doing anything wrong in this simple code.
>
There was this change:
http://svn.apache.org/viewvc?view=revision&revision=1544213
<fix>
<bug>55799</bug>: Correctly enforce the restriction in JSR356 that no
more than one data message may be sent to a remote WebSocket endpoint at
a time. (markt)
</fix>
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