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No Format
$>open 10167
$>info -b kafka.server:name=TotalFetchRequestsPerSec,topic=topicG,type=BrokerTopicMetrics
#mbean = kafka.server:name=TotalFetchRequestsPerSec,topic=topicG,type=BrokerTopicMetrics
#class name = com.yammer.metrics.reporting.JmxReporter$Meter
# attributes
  %0   - Count (long, r)
  %1   - EventType (java.lang.String, r)
  %2   - FifteenMinuteRate (double, r)
  %3   - FiveMinuteRate (double, r)
  %4   - MeanRate (double, r)
  %5   - OneMinuteRate (double, r)
  %6   - RateUnit (java.util.concurrent.TimeUnit, r)
# operations
  %0   - javax.management.ObjectName objectName()
#there's no notifications
$>get -s -b kafka.server:name=TotalFetchRequestsPerSec,topic=topicG,type=BrokerTopicMetrics OneMinuteRate
#mbean = kafka.server:name=TotalFetchRequestsPerSec,topic=topicG,type=BrokerTopicMetrics:
7.960856160430041

(You can use the domain command to set the domain to avoid having to type out the fully qualified object name.)

Non-interactive (batch) mode

Same as above example, but non-interactive.

No Format
$ cat jmxcommands 
open 10167
get -s -b kafka.server:name=TotalFetchRequestsPerSec,topic=topicG,type=BrokerTopicMetrics OneMinuteRate
close

$ java -jar jmxterm-1.0-alpha-4-uber.jar -v silent -n < jmxcommands 
7.973832278363945

If you have a JMX URI at hand, you can also poke remote mbeans:

No Format
$ java -jar jmxterm-1.0-alpha-4-uber.jar -l <JMX URI> -v silent -n < jmxcommands
No Format
echo