Kafka - Getting messages from the beginning of my subscribed topics

DevOps Kafka
#1

Hi anyone can help ? How can i get all messages from the beginning in all of my subscribed topics? I am using consumer.subscribe(pattern). I tried including ConsumerRebalanceListener but onPartitionsAssigned didnt get invoked at all.

#2

Consumer.seekToBeginning()

#3

Note you have to poll once before you can do this, in order to join the consumer group. consumer.poll(0) is the standard practice

#4 
consumer.subscribe(pattern);
consumer.poll(Duration.ofMillis(100L));
consumer.seekToBeginning(consumer.assignment());```
I tried it and still couldn't get any messages. The log indicates that the consumer has subscribed to the topics.
#5

Did you poll() again after seekToBeginning()?

#6

Yes I did and it didn’t return any messages on both. seektobeginning() works with a single topic and using consumer.assign(). I followed this as well https://stackoverflow.com/questions/53089007/apache-kafka-seek-and-assignment-reliable-read-from-beginning but no success so far.