diff --git a/broker/src/main/resources/rmq.broker.logback.xml b/broker/src/main/resources/rmq.broker.logback.xml
index 3f920a1b4ab..499c6377b8a 100644
--- a/broker/src/main/resources/rmq.broker.logback.xml
+++ b/broker/src/main/resources/rmq.broker.logback.xml
@@ -18,6 +18,8 @@
 
 <configuration scan="true" scanPeriod="30 seconds">
 
+    <statusListener class="ch.qos.logback.core.status.NopStatusListener"/>
+
     <appender name="DefaultSiftingAppender_inner" class="ch.qos.logback.classic.sift.SiftingAppender">
         <discriminator>
             <key>brokerContainerLogDir</key>
diff --git a/common/src/main/java/org/apache/rocketmq/common/attribute/TopicMessageType.java b/common/src/main/java/org/apache/rocketmq/common/attribute/TopicMessageType.java
index 9d3cb7608e5..dec21d096f9 100644
--- a/common/src/main/java/org/apache/rocketmq/common/attribute/TopicMessageType.java
+++ b/common/src/main/java/org/apache/rocketmq/common/attribute/TopicMessageType.java
@@ -33,9 +33,11 @@ public enum TopicMessageType {
     MIXED("MIXED");
 
     private final String value;
+    private final String metricsValue;
 
     TopicMessageType(String value) {
         this.value = value;
+        this.metricsValue = value.toLowerCase(java.util.Locale.ROOT);
     }
 
     public static Set<String> topicMessageTypeSet() {
@@ -67,6 +69,6 @@ public static TopicMessageType parseFromMessageProperty(Map<String, String> mess
     }
 
     public String getMetricsValue() {
-        return value.toLowerCase();
+        return metricsValue;
     }
 }
diff --git a/remoting/src/main/java/org/apache/rocketmq/remoting/common/RemotingHelper.java b/remoting/src/main/java/org/apache/rocketmq/remoting/common/RemotingHelper.java
index 52f7561d719..d80802c5cee 100644
--- a/remoting/src/main/java/org/apache/rocketmq/remoting/common/RemotingHelper.java
+++ b/remoting/src/main/java/org/apache/rocketmq/remoting/common/RemotingHelper.java
@@ -369,10 +369,12 @@ public static CompletableFuture<Void> convertChannelFutureToCompletableFuture(Ch
     }
 
     public static String getRequestCodeDesc(int code) {
-        return REQUEST_CODE_MAP.getOrDefault(code, String.valueOf(code));
+        String desc = REQUEST_CODE_MAP.get(code);
+        return desc != null ? desc : String.valueOf(code);
     }
 
     public static String getResponseCodeDesc(int code) {
-        return RESPONSE_CODE_MAP.getOrDefault(code, String.valueOf(code));
+        String desc = RESPONSE_CODE_MAP.get(code);
+        return desc != null ? desc : String.valueOf(code);
     }
 }