Heartbeat failed for group <id> because it is rebalancing

Hi,

Our node details are as follows Kafka - 3 nodes (shared between different applications) App - 2 nodes (ie 2 consumers per topic, total 5 topics) Kafka settings - version 1.0 with default settings, nothing changed

FYI, Kafka settings

broker.id=1
num.network.threads=3
num.io.threads=8
socket.send.buffer.bytes=102400
socket.receive.buffer.bytes=102400
socket.request.max.bytes=104857600
log.dirs=/var/lib/kafka
num.partitions=1
num.recovery.threads.per.data.dir=1
default.replication.factor=3
offsets.topic.replication.factor=3
transaction.state.log.replication.factor=3
transaction.state.log.min.isr=2
log.retention.bytes=1073741824
log.segment.bytes=1073741824
log.retention.check.interval.ms=300000
log.retention.hours=120
zookeeper.connection.timeout.ms=6000
confluent.support.metrics.enable=false
group.initial.rebalance.delay.ms=0
confluent.support.customer.id=anonymous
auto.create.topics.enable=false

Consumer s running fine , if I run one node with one consumer. The moment I start another consumer from other node, I get the group rebalancing error for some topics immediately.

I have tried with below consumer settings, still I see the same error.

AIOKafkaConsumer(
        #evgaKafkaName(topic_name),
        topic_name,
        loop=loop,
        #bootstrap_servers=getKafkaBrokers(),
        bootstrap_servers=BROKERS,
        # group_id=evgaKafkaName(group_name),
        group_id=group_name,
        #security_protocol='SSL',
        #ssl_context=getKafkaSslContext(),
        value_deserializer=lambda v: v.decode('utf8'),
        #value_deserializer=deserializer,
        enable_auto_commit=True,
        auto_offset_reset=auto_offset_reset,
        consumer_timeout_ms=consumer_timeout_ms,
        retry_backoff_ms=10,
        #heartbeat_interval_ms=50,
        session_timeout_ms=60000,
        #request_timeout_ms=80 * 1000,
        #fetch_max_wait_ms=3000,
        max_poll_records=50
    )

What could be the issue, anything to do with rebalance.max.retries and rebalance.backoff.ms and session timeout ?

Thanks, Bala