spring cloud stream - consumer group bound - spring-boot

Question

My consumer is bound to anonymous consumer group instead of consumer group I specified.
spring:
cloud:
stream:
kafka:
binder:
brokers: localhost
defaultBrokerPort: 9092
zkNodes: localhost
defaultZkPort: 2181
bindings:
inEvent:
group: eventin
destination: event
outEvent:
group: eventout
destination: processevent
My Spring boot applicaition
#SpringBootApplication
#EnableBinding(EventStream.class)
public class ConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(ConsumerApplication.class, args);
}
#StreamListener(value = "inEvent")
public void getEvent(Event event){
System.out.println(event.name);
}
}
My input output channel interface
public interface EventStream {
#Input("inEvent")
SubscribableChannel inEvent();
#Output("outEvent")
MessageChannel outEvent();
}
my console log--
: Started ConsumerApplication in 3.233 seconds (JVM running for 4.004)
: [Consumer clientId=consumer-3, groupId=anonymous.0d0c87d6-ef39-4bfe-b475-4491c40caf6d] Discovered
group coordinator singh:9092 (id: 2147483647 rack: null)
: [Consumer clientId=consumer-3, groupId=anonymous.0d0c87d6-ef39-4bfe-b475-4491c40caf6d] Revoking
previously assigned partitions []
: partitions revoked: []
: [Consumer clientId=consumer-3, groupId=anonymous.0d0c87d6-ef39-4bfe-b475-4491c40caf6d] (Re-)joining
group
: [Consumer clientId=consumer-3, groupId=anonymous.0d0c87d6-ef39-4bfe-b475-4491c40caf6d] Successfully
joined group with generation 1
: [Consumer clientId=consumer-3, groupId=anonymous.0d0c87d6-ef39-4bfe-b475-4491c40caf6d] Setting newly
assigned partitions [inEvent-0]
: [Consumer clientId=consumer-3, groupId=anonymous.0d0c87d6-ef39-4bfe-b475-4491c40caf6d] Resetting
offset for partition inEvent-0 to offset 2.
: partitions assigned: [inEvent-0]

Answer 1

The group property must not be in the kafka tree.
It has to be like this:
My consumer is bound to anonymous consumer group instead of consumer group I specified.
spring:
cloud:
stream:
bindings:
inEvent:
group: eventin
destination: event
See more info in the Docs: http://cloud.spring.io/spring-cloud-static/spring-cloud-stream/2.1.1.RELEASE/single/spring-cloud-stream.html#consumer-groups
The group is a common property, so it is the same independently of the binder implementation. The kafka is for Apache Kafka specific properties, exposed on its binder implementation level.