On Thu, 20 Jul 2006, [EMAIL PROTECTED] wrote:
??????
Hello, I am developing a distributed application using CORBA.
My client application in aix 5.2.0.0 works properly when the server
application is up . The server application run on windows.
If the server is down, then run the client app and get the following:
"
uncaught MICO exception: IDL:omg.org/CORBA/COMM_FAILURE:1.0 (0,
not-completed)
IOT/Abort trap(coredump)
"
In my prougramm the functions is :
int
lookup()
{
// ORB initialization
CORBA::ORB_var orb = CORBA::ORB_init(num, opt);
// Acquire a reference to the Naming Service
CORBA::Object_var nsobj =
orb->resolve_initial_references("NameService");
CosNaming::NamingContext_var nc =
CosNaming::NamingContext::_narrow(nsobj);
if(CORBA::is_nil(nc))
{
cerr << "oops, I cannot access the Naming Service!" << endl;
return(-1);
}
// Construct Naming Service name
CosNaming::Name name;
name.length(1);
name[0].id = CORBA::string_dup("upSendMsg"); // "upSendMsg" is the
name of Naming Service
name[0].kind = CORBA::string_dup("");
// try to find that node in the Naming Service tree
CORBA::Object_var obj;
#ifdef HAVE_EXCEPTIONS
try
{
obj = nc->resolve(name);
}
catch(CosNaming::NamingContext::NotFound &exc)
{
cout << "NotFound exception." << endl;
return(-1);
}
catch(CosNaming::NamingContext::CannotProceed &exc)
{
cout << "CannotProceed exception." << endl;
return(-1);
}
catch (CosNaming::NamingContext::InvalidName &exc)
{
cout << "InvalidName exception." << endl;
return(-1);
}
catch (CosNaming::NamingContext::AlreadyBound &exc)
{
cout << "AlreadyBound exception." << endl;
return(-1);
}
catch (CosNaming::NamingContext::NotEmpty &exc)
{
cout << "NotEmpty exception." << endl;
return(-1);
}
catch (...)
{
cerr << "Cannot find EventChannel !" << endl;
cout << "Cannot find EventChannel !" << endl;
return(-1);
}
#else
obj = nc->resolve(name);
wcout<<"here is "<<endl;
#endif
wcout<<"here is "<<endl;
// The Naming Service returns a generic reference as a CORBA::Object
// We need to narrow this to the desired type
up = UpSendMsgInterface::_narrow(obj);
return( 0 );
}
================================================================================
My question is why the client can not catch exception when the server is
not up .
The problem is that you have not guarded by try/catch block all possible
remote calls done by your code snipped above. Please note that _narrow
also causes remote invocation.
Cheers,
Karel
--
Karel Gardas [EMAIL PROTECTED]
ObjectSecurity Ltd. http://www.objectsecurity.com
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