excpetion on reception of incoming message in qpid cpp client

Question

First of all thanks for providing platform to discuss about issues.

I found issue with qpid cpp client program.

try{
cout << "Trying to open a connection" << endl;
connection.open("1.1.1.8", 10002);
session = connection.newSession();
SubscriptionManager subscriptions(session);
Listener listener(subscriptions);
subscriptions.subscribe(listener, receiver_queue);
//    subscriptions.run();
   subscriptions.start();
   sleep(10);
  }
 catch(const std::exception& error) {
  DEBUG(DBG_ERR, (char *)"AMQP-[%s]: Connection Error [%s].", __func__,error.what());
    connection.close();
   return RESULT_FAILURE;
 }

After subscriptions.start, if I send any message to client program, i could see message is received but it failed with the following exception.

terminate called after throwing an instance of 'qpid::Exception'
  what():  Invalid argument (../include/qpid/sys/posix/Mutex.h:116)
Aborted

Stack says..

(gdb) bt
#0  0x0024b424 in __kernel_vsyscall ()
#1  0x00276af1 in raise () from /lib/libc.so.6
#2  0x002783ca in abort () from /lib/libc.so.6
#3  0x0026fdcb in __assert_fail_base () from /lib/libc.so.6
#4  0x0026fe86 in __assert_fail () from /lib/libc.so.6
#5  0x00b683b6 in unlock (this=0x88501fc, name="A.B.ToApplication")
at ../include/qpid/sys/posix/Mutex.h:120
#6  ~ScopedLock (this=0x88501fc, name="A.B.ToApplication") 
at        .    ./include/qpid/sys/Mutex.h:34
#7  qpid::client::Dispatcher::find (this=0x88501fc,  
  name="A.B.ToApplication")
 at qpid/client/Dispatcher.cpp:137
#8  0x00b68752 in qpid::client::Dispatcher::run (this=0x88501fc) at    
qpid/client/Dispatcher.cpp:83
#9  0x00d5b701 in qpid::sys::(anonymous namespace)::runRunnable (p=0x88501fc) at 
qpid/sys/posix/Thread.cpp:35
#10 0x00564a09 in start_thread () from /lib/libpthread.so.0
#11 0x0032915e in clone () from /lib/libc.so.6
(gdb)

Am i missing something here ?

please help me.

score 2 · Answer 1 · answered Aug 15 '12 at 15:36

Don't use SubscriptionManager::start() - it is broken as it doesn't allow handling of exceptions - use SubscriptionManager::run() instead, spawning a new thread on which to do so if needed.

I would also strongly advise you to move to the qpid::messaging API instead of the old and now deprecated qpid::client API. The former is simpler and will allow easier transition to AMQP 1.0, and that is where all new development will occur.

excpetion on reception of incoming message in qpid cpp client

1 Answers1