ActiveMQActivationSpec.validate() method should not call e.printStackTrace(); in catch block. It should be properly logged:

      try {
       ...
      catch (IntrospectionException e) {
         e.printStackTrace();
      }

The same issue is in:
InVMAcceptor.stop()
NettyAcceptor.stop()
ClusterManager.clear()
ClusterManager.intercept()
ColocatedHAManager.stop()
ClusterConnectionImpl.disconnectRecord()
ClusterConnectionImpl.removeRecord()
ActiveMQServerImpl.freezeConnections()
ColocatedActivation.allVotesCast()
ColocatedActivation.getActivationChannelHandler()
FileLockNodeManager.startLiveNode()
InVMNodeManager.startLiveNode()
RefsOperation.afterRollback()
ServerSessionImpl.xaForget()
SharedNothingBackupActivation.run()
SharedStoreBackupActivation.run()
ManagementServiceImpl.unregisterAcceptors()