Virtual services MQ connections failing in 10.8 with 'Bad Type on Operand Stack' error

Products

• Service Virtualization

Issue/Introduction

After upgrading to DevTest 10.8, we are seeing the MQ connections fail for our virtual services, with the following error:

STACK TRACE
java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    com/ibm/mq/ese/jmqi/ESEJMQI.spiConnect(Ljava/lang/String;Lcom/ibm/mq/jmqi/system/SpiConnectOptions;Lcom/ibm/mq/jmqi/MQCNO;Lcom/ibm/mq/jmqi/handles/Phconn;Lcom/ibm/mq/jmqi/handles/Pint;Lcom/ibm/mq/jmqi/handles/Pint;)V @63: invokespecial
  Reason:
    Type 'com/ibm/mq/jmqi/system/SpiConnectOptions' (current frame, stack[2]) is not assignable to 'com/ibm/mq/jmqi/system/LpiPrivConnStruct'
  Current Frame:
    bci: @63
    flags: { }
    locals: { 'com/ibm/mq/ese/jmqi/ESEJMQI', 'java/lang/String', 'com/ibm/mq/jmqi/system/SpiConnectOptions', 'com/ibm/mq/jmqi/MQCNO', 'com/ibm/mq/jmqi/handles/Phconn', 'com/ibm/mq/jmqi/handles/Pint', 'com/ibm/mq/jmqi/handles/Pint' }
    stack: { 'com/ibm/mq/ese/jmqi/ESEJMQI', 'java/lang/String', 'com/ibm/mq/jmqi/system/SpiConnectOptions', 'com/ibm/mq/jmqi/MQCNO', 
'com/ibm/mq/jmqi/handles/Phconn', 'com/ibm/mq/jmqi/handles/Pint', 'com/ibm/mq/jmqi/handles/Pint' }

Environment

DevTest 10.8

Cause

Upon investigation, we noticed the following MQ jar files were placed in the DevTest_Home\lib directory:

• com.ibm.mq.commonservices.jar
• com.ibm.mq.headers.jar
• com.ibm.mq.jar
• com.ibm.mq.jmqi.jar
• connector.jar
• com.ibm.mqjms.jar
• com.ibm.mq.allclient-9.0.4.0.jar
• dhbcore.jar
• jms.jar
• jndi.jar
• com.ibm.dhbcore.jar

Placing the MQ jar files in the DevTest_Home\lib directory appears to be conflicting with the core DevTest jars. DevTest 10.8 is picky about where 3rd-party jars are place. A good rule of thumb is to place all 3rd-party jar files inside the DevTest_Home\lib\shared directory.

Resolution

To correct the issue, move the following two jars into the DevTest_Home/lib/shared directory:

• com.ibm.mq.allclient-9.0.4.0.jar
• com.ibm.mq.commonservices.jar

Remove all other jars, as these are not required for MQ release 9, and restarted the service.