Accessing MQ with JMS

Question

i am using MQ7 and trying to access a queue with JMS api's. Getting this error. Has anyone seen it before? How do i resolve this? TIA

Exception in thread "main" com.ibm.msg.client.jms.DetailedJMSException: JMSFMQ6312: An exception occurred in the Java(tm) MQI. The Java(tm) MQI has thrown an exception describing the problem. See the linked exception for further information.

Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2495;AMQ8568: The native JNI library 'mqjbnd' was not found. [3=mqjbnd]

Caused by: java.lang.UnsatisfiedLinkError: no mqjbnd in java.library.path

Answer 1

Probably a bit late but I had the same problem and found that this can be avoided if you use a different Connection Mode when connecting to a remote Queue. By default the MQConnectionFactory uses WMQ_CM_BINDINGS as it's connection mode. If you change it to WMQ_CM_CLIENT (or whichever connection mode you like that doesn't require native libraries) you should be fine.

@Test
public void testMQConnectionMode() throws JMSException {
    MQConnectionFactory cf = new MQConnectionFactory();
    assertThat(cf.getIntProperty(CommonConstants.WMQ_CONNECTION_MODE), is(equalTo(CommonConstants.WMQ_CM_BINDINGS)));
    cf.setIntProperty(CommonConstants.WMQ_CONNECTION_MODE, CommonConstants.WMQ_CM_CLIENT);
    assertThat(cf.getIntProperty(CommonConstants.WMQ_CONNECTION_MODE), is(equalTo(CommonConstants.WMQ_CM_CLIENT)));
}

Answer 2

Agree with Johnam, it happened because the ConnectionFactory set as server by default, it need to be set as client, you said that it works on same machine. Because I also met the same situation, it run when on same machine, in this case because your machine is as WMQ Server so do the program, but when you run on different machine then your program must set as client.

I fix it using set some parameter on ConnectionFactory:

<bean id="mqConnectionFactory" class="com.ibm.mq.jms.MQConnectionFactory">
....
<property name="transportType" value="1" />
<property name="clientReconnectTimeout" value="2" /> 
<property name="clientReconnectOptions" value="0" />
</bean>