Merge pull request 'allow rebalance on unsubscribe' (#125) from unsubfix into v3

Reviewed-on: #125

subscriber.go

@@ -52,10 +52,11 @@ func (s *subscriber) Unsubscribe(ctx context.Context) error {
 		return nil
 	}
 	select {
-	case <-ctx.Done():
-		return ctx.Err()
+	// case <-ctx.Done():
+	//	return ctx.Err()
 	default:
 		s.c.PauseFetchTopics(s.topic)
+		s.c.CloseAllowingRebalance()
 		kc := make(map[string][]int32)
 		for ctp := range s.consumers {
 			kc[ctp.t] = append(kc[ctp.t], ctp.p)
@@ -80,7 +81,6 @@ func (s *subscriber) poll(ctx context.Context) {
 			s.c.CloseAllowingRebalance()
 			return
 		case <-s.done:
-			s.c.CloseAllowingRebalance()
 			return
 		default:
 			fetches := s.c.PollRecords(ctx, maxInflight)