The Apache Kafka System Tools are located https://github.com/apache/kafka/tree/0.8/core/src/main/scala/kafka/tools
They can be run from the command line using the run class script (i.e. bin/kafka-run-class.sh package.class --options)
Consumer Offset Checker
Displays the: Consumer Group, Topic, Partitions, Offset, logSize, Lag, Owner for the specified set of Topics and Consumer Group
bin/kafka-run-class.sh kafka.tools.ConsumerOffsetChecker
required argument: [group]
Option Description
------ -----------
--broker-info Print broker info
--group Consumer group.
--help Print this message.
--topic Comma-separated list of consumer
topics (all topics if absent).
--zkconnect ZooKeeper connect string. (default: localhost:2181)