Kafka 0.11 how to reset offsets

Question

I'm trying to reset consumer offset with latest CLI tools for Kafka.

kafka-consumer-groups.bat --bootstrap-server kafka-host:9092 --group my-group --reset-offsets --to-earliest --all-topics

As a result I see this output:

TOPIC                            PARTITION  NEW-OFFSET
FirstTopic                       0          0
SecondTopic                      0          0

But running again command:

kafka-consumer-groups.bat --bootstrap-server kafka-host:9092 --group my-group --describe

results in output:

Consumer group 'my-group' has no active members.

TOPIC              PARTITION  CURRENT-OFFSET  LOG-END-OFFSET  LAG
FirstTopic         0          1230            1230            0  
SecondTopic        0          1022            1022            0

I've tried other options like resetting to explicit offset or specifying the topic directly but result is same. The output suggests that operation succeed while checking offsets with describe command or debugging shows that offset has not be changed.

Anyone succeed with resetting consumer offset within non-zookeeper brokers.

Answer 1

By default, --reset-offsets just prints the result of the operation. To actually perform the operation you need to add --execute to your command:

kafka-consumer-groups.bat --bootstrap-server kafka-host:9092 --group
my-group --reset-offsets --to-earliest --all-topics --execute