Error UNKNOWN_MEMBER_ID occurred while committing offsets for group xxx

Question

With Kafka client Java library, consuming logs has worked for some time but with the following errors it doesn\'t work any more:

2016-07-15 19:37:54.609  INFO 43         


        

Answer 1

I just faced the same issue. I have been investigating, and in this thread and in this wiki you can find the solution.

The issue seems to be that the processing of a batch takes longer than the session timeout. Either increase the session timeout or the polling frequency or limit the number of bytes received.

What worked for me was changing max.partition.fetch.bytes. But you can also modify session.timeout.ms or the value you pass to your consumer.poll(TIMEOUT)