Kafka Consumer Groups loose their members

[AVGI-AVLQ]

Hello,

We are currently facing an issue inside our Strimzi environment (v0.24). We run Kafka broker, KafkaConnect instance and Source/Sink connectors over OpenShift. At the beginning everything is ok: but after some time, consumer groups start loosing members until they become empty. Sink connectors are not able to rejoin anymore, so we do not consume data anymore.

We have no errors in logs. Do you have any idea about what could the root cause of our issue be?
So far we tried to:

• setup an odd number of replicas (so that partition-leader election process should work fine)
• have a single partition for topic used for "config.storage.topic"
• make sure every component is connected after the Kubernetes startup
• monitor the cluster rebalacing process (which apparently seems to be ok)