Unable to connect to Websphere MQ Manager using XMS - c++

Question

This code reproduces the issue:
#include <iostream>
#include <xms.hpp>
int main()
{
try
{
xms::ConnectionFactory factory;
factory.setIntProperty(XMSC_CONNECTION_TYPE, XMSC_CT_WMQ);
factory.setIntProperty(XMSC_WMQ_CONNECTION_MODE, XMSC_WMQ_CM_CLIENT);
factory.setStringProperty(XMSC_WMQ_QUEUE_MANAGER, "my.queue.manager");
factory.setStringProperty(XMSC_WMQ_HOST_NAME, "my.dev.mq");
factory.setStringProperty(XMSC_WMQ_CHANNEL, "my.channel");
factory.setIntProperty(XMSC_WMQ_PORT, 1414);
std::cout << "Is Factory Null? => " << factory.isNull() << std::endl;
xms::Connection conn = factory.createConnection(); //THIS THROWS EXCEPTION
std::cout << "Is Factory Null? => " << factory.isNull() << std::endl;
}
catch(xms::Exception const & e)
{
e.dump(std::cout);
}
}
It throws exception, dumping the following message:
Is Factory Null? => 0
Exception:
ErrorData =
ErrorCode = 26 (XMS_E_CONNECT_FAILED)
JMS Type = 1 (XMS_X_GENERAL_EXCEPTION)
Linked Exception:
ErrorData = libmqic_r.so
ErrorCode = 0 (XMS_E_NONE)
JMS Type = 1 (XMS_X_GENERAL_EXCEPTION)
Any idea what is wrong with the code?
Note that devpmmq is just an alias to the actual IP address (host). If I put any random/nonsense value for it, I get the same error, which is bad because the API should have given a better error message such as "host not found" or something alone that line. Is there any way to enable more verbose diagnostics?

Answer 1

XMS C/C++ internally loads WebSphere MQ client libraries. The problem here is that XMS is unable to find WebSphere MQ client library libmqm_r.so.
What is puzzling me is that the code has set XMSC_WMQ_CONNECTION_MODE as XMSC_WMQ_CM_CLIENT but XMS is attempting to load libmqm_r.so. It should have attempted to load libmqic_r.so.
Have you installed WebSphere MQ client? Also what is the version of XMSClients can be downloaded from here.