Producer/consumer JMX metrics

[Tarun Garg]

Hi,

I stuck in a dump problem. it seems atleast like that.

I have a collectd conf file
```
LoadPlugin java

<Plugin java>
    <Plugin "GenericJMX">
        <MBean "kafka.producer.request-rate">
            ObjectName "kafka.producer:type=producer-metrics,clientId=([-.\w]+)"
            InstancePrefix "all"
            <Value>
                InstancePrefix "kafka-producer-request-rate"
                Type "gauge"
                Table false
                Attribute "request-rate"
            </Value>
        </MBean>

        <Connection>
            ServiceURL "service:jmx:rmi:///jndi/rmi://localhost:9999/jmxrmi"
            Host "tgarg"
            Collect "classes"
            Collect "garbage_collector"
            Collect "memory-heap"
            Collect "memory-nonheap"
            Collect "memory_pool"

            Collect "kafka.producer.request-rate"
        </Connection>
    </Plugin>
</Plugin>```

this looks good to me but on collectd end i am getting ```collectd[552]: 
GenericJMXConfMBean: No MBean matched the ObjectName 
kafka.producer:type=producer-metrics,clientId=([-.w]+)```

any help is appreciated.
Thanks-Tarun