Changes between Version 89 and Version 90 of FAQ

Timestamp:

Feb 23, 2010 1:02:43 PM (14 years ago)

Author:

nanang

Comment:

Added symbian specific problem: socket op returning PJ_ECANCELLED

FAQ

@@ -1487 +1487 @@
  - please use the latest APS version (currently 2.40(3)), and make sure the APSServer version installed on your device matches the APS SDK/plug-in when building the application.
 
+=== Socket operation send/receive returning {{{PJ_ECANCELLED}}} === #symbsockcancelled
+
+Symptoms:
+ - network connection is fine and socket seems to be in connected state, but send/receive operation suddenly returns {{{PJ_ECANCELLED}}} while previously such operations has been succeeded
+ - debugging the socket implementation shows that {{{KErrServerBusy}}} is returned by Symbian socket operation.
+
+As mentioned in [http://developer.symbian.org/main/documentation/reference/s%5E3/doc_source/GT_tb92sf/esockserver/RSocketServClass.html#%3a%3aRSocketServ%3a%3aConnect%28TUint%29 RSocketServ::Connect()] reference manual, the maximum number of outstanding asynchronous operations for a Symbian socket server is limited, and the default limit is rather low, {{{KESockDefaultMessageSlots}}} == 8, and when the limit is reached, next socket asynchronous operation will return {{{KErrServerBusy}}}. In this case, the PJLIB socket implementation may switch the socket state to disconnected.
+
+Solutions:
+ - In the application, set the maximum number of outstanding asynchronous operation of a Symbian socket server to a higher number, such as 32, e.g:
+   {{{
+pj_symbianos_params sym_params;
+RSocketServ socket_server;
+RConnection connection;
+
+socket_server.Connect(32);
+connection.Open(socket_server);
+connection.Start();
+
+// This must be done before pj_init() is called.
+pj_bzero(&sym_params, sizeof(sym_params));
+sym_params.rsocketserv = &socket_server;
+sym_params.rconnection = &connection;
+pj_symbianos_set_params(&sym_params);
+   }}}
+
 === Various Carbide Load Failed/TRKProtocolPlugin error === #trk