Bug: When appRebalanceEnable == true and rebalanceCb == nil and channel == nil, it shound return ev #1457
Description
When appRebalanceEnable == true and rebalanceCb == nil and channel == nil, we want handle the event by poll , so the rebalance event should return by poll but not nil.
link:
confluent-kafka-go/kafka/consumer.go
Line 1029 in 1b46fb9
fix example:
if c.appRebalanceEnable && c.rebalanceCb == nil {
// Channel-based consumer with rebalancing enabled,
// return the rebalance event and rely on the application
// to call *Assign() / *Unassign().
return ev
}