Problem determining consumer lag via jmx

Refering to the monitoring secton available on the kafka doc website I am
unable to see kafka.consumer bean on the jconsole. Is this bean not exposed
via jconsole ?

"kafka.consumer":name="([-.\w]+)-MaxLag",type="ConsumerFetcherManager"

I am using kafka-0.8.1.1.

Also when I try to connect via a java program to this jmx bean/object I get
an exception as - invalid sequence \w.

Any pointers will be helpful ?

Thanks and Regards,
Devang