ActiveMQ Monitoring Extension Problem: NoClassDefFoundError - FileAlterationListener

Team, 

I have installed activemq monitoring extension under Machine Server Agent in standalone machine. When I start machine server agent, i got below exception.

I have seen the same exception discussed over this forum for RabbitMQ. Hence I tried updating classpath with commons-httpclient-3.1.jar in monitors/ActiveMQMonitor/monitor.xml. Still getting this same below execption. 

Can you please help me to setup this?

[Worker-1] 19 Dec 2016 13:23:33,357 INFO ProcessMonitor - Finished collecting metrics...
[Worker-1] 19 Dec 2016 13:23:33,359 INFO ProcessMonitor - Finished printing metrics...
[Worker-1] 19 Dec 2016 13:23:33,359 INFO ProcessMonitor - New round of metric collection started
[Agent-Scheduler-1] 19 Dec 2016 13:23:35,676 ERROR PeriodicTaskRunner - Error creating environment task
java.lang.NoClassDefFoundError: org/apache/commons/io/monitor/FileAlterationListener
at com.appdynamics.extensions.activemq.ActiveMQMonitor.initialize(ActiveMQMonitor.java:83)
at com.appdynamics.extensions.activemq.ActiveMQMonitor.execute(ActiveMQMonitor.java:65)
at com.singularity.ee.agent.systemagent.components.monitormanager.managed.MonitorTaskRunner.runTask(MonitorTaskRunner.java:143)
at com.singularity.ee.agent.systemagent.components.monitormanager.managed.PeriodicTaskRunner.runTask(PeriodicTaskRunner.java:95)
at com.singularity.ee.agent.systemagent.components.monitormanager.managed.PeriodicTaskRunner.run(PeriodicTaskRunner.java:48)
at com.singularity.ee.util.javaspecific.scheduler.AgentScheduledExecutorServiceImpl$1.run(AgentScheduledExecutorServiceImpl.java:34)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at com.singularity.ee.util.javaspecific.scheduler.ADFutureTask$Sync.innerRunAndReset(ADFutureTask.java:290)
at com.singularity.ee.util.javaspecific.scheduler.ADFutureTask.runAndReset(ADFutureTask.java:145)
at com.singularity.ee.util.javaspecific.scheduler.ADScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ADScheduledThreadPoolExecutor.java:82)
at com.singularity.ee.util.javaspecific.scheduler.ADScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ADScheduledThreadPoolExecutor.java:160)
at com.singularity.ee.util.javaspecific.scheduler.ADScheduledThreadPoolExecutor$ScheduledFutureTask.run(ADScheduledThreadPoolExecutor.java:184)
at com.singularity.ee.util.javaspecific.scheduler.ADThreadPoolExecutor$Worker.runTask(ADThreadPoolExecutor.java:667)
at com.singularity.ee.util.javaspecific.scheduler.ADThreadPoolExecutor$Worker.run(ADThreadPoolExecutor.java:692)
at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.io.monitor.FileAlterationListener
at com.singularity.ee.util.loader.FileSystemClassLoader.findClass(FileSystemClassLoader.java:322)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at com.singularity.ee.util.loader.FileSystemClassLoader.loadClass(FileSystemClassLoader.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 15 more

My ActiveMQ config.yml:

root@XX : XX@XX # head -20 monitors/ActiveMQMonitor/config.yml
### ANY CHANGES TO THIS FILE DOES NOT REQUIRE A RESTART ###

#This will create this metric in all the tiers, under this path
metricPrefix: Custom Metrics|ActiveMQ

#This will create it in specific Tier. Replace <TIER_NAME>
#metricPrefix: Server|Component:<TIER_NAME>|Custom Metrics|ActiveMQ

# List of ActiveMQ Servers
servers:
- host: "localhost"
port: 8161
username: "<<user name to access activemq console>>"
password: "<<password to access activemq console>>"
#displayName is a required field. This will be your server name that will show up in metric path.
displayName: "activemqb"

# number of concurrent tasks.
# This doesn't need to be changed unless many servers are configured