diff --git a/mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/support/Qos1PublishHandler.java b/mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/support/Qos1PublishHandler.java
index cab9bd1d2..9cec6ecc6 100644
--- a/mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/support/Qos1PublishHandler.java
+++ b/mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/support/Qos1PublishHandler.java
@@ -73,7 +73,9 @@ public CompletableFuture<Void> publish(Connection connection, MqttAdapterMessage
                 }).exceptionally(ex -> {
                     Throwable realCause = FutureUtil.unwrapCompletionException(ex);
                     if (realCause instanceof MQTTNoMatchingSubscriberException) {
-                        log.warn("[{}] Write {} to Pulsar topic succeed. But do not have subscriber.", topic, msg);
+                        if (log.isDebugEnabled()) {
+                            log.debug("[{}] Write {} to Pulsar topic succeed. But do not have subscriber.", topic, msg);
+                        }
                         MqttAck mqttAck = MqttPubAck.successBuilder(protocolVersion)
                                 .packetId(packetId)
                                 .isNoMatchingSubscription()