diff --git a/remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingServer.java b/remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingServer.java
index 662a5f2e6a9..8ae87a6fa53 100644
--- a/remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingServer.java
+++ b/remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingServer.java
@@ -453,13 +453,13 @@ public HandshakeHandler() {
         }
 
         @Override
-        protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
+        protected void decode(ChannelHandlerContext ctx, ByteBuf byteBuf, List<Object> out) throws Exception {
             try {
-                ProtocolDetectionResult<HAProxyProtocolVersion> ha = HAProxyMessageDecoder.detectProtocol(in);
-                if (ha.state() == ProtocolDetectionState.NEEDS_MORE_DATA) {
+                ProtocolDetectionResult<HAProxyProtocolVersion> detectionResult = HAProxyMessageDecoder.detectProtocol(byteBuf);
+                if (detectionResult.state() == ProtocolDetectionState.NEEDS_MORE_DATA) {
                     return;
                 }
-                if (ha.state() == ProtocolDetectionState.DETECTED) {
+                if (detectionResult.state() == ProtocolDetectionState.DETECTED) {
                     ctx.pipeline().addAfter(defaultEventExecutorGroup, ctx.name(), HA_PROXY_DECODER, new HAProxyMessageDecoder())
                             .addAfter(defaultEventExecutorGroup, HA_PROXY_DECODER, HA_PROXY_HANDLER, new HAProxyMessageHandler())
                             .addAfter(defaultEventExecutorGroup, HA_PROXY_HANDLER, TLS_MODE_HANDLER, tlsModeHandler);
@@ -494,8 +494,8 @@ public class TlsModeHandler extends SimpleChannelInboundHandler<ByteBuf> {
         @Override
         protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) {
 
-            // Peek the first byte to determine if the content is starting with TLS handshake
-            byte b = msg.getByte(0);
+            // Peek the current read index byte to determine if the content is starting with TLS handshake
+            byte b = msg.getByte(msg.readerIndex());
 
             if (b == HANDSHAKE_MAGIC_CODE) {
                 switch (tlsMode) {
diff --git a/store/src/main/java/org/apache/rocketmq/store/timer/Slot.java b/store/src/main/java/org/apache/rocketmq/store/timer/Slot.java
index b91193b94af..2da846ceed1 100644
--- a/store/src/main/java/org/apache/rocketmq/store/timer/Slot.java
+++ b/store/src/main/java/org/apache/rocketmq/store/timer/Slot.java
@@ -16,9 +16,17 @@
  */
 package org.apache.rocketmq.store.timer;
 
+/**
+ * Represents a slot of timing wheel. Format:
+ * ┌────────────┬───────────┬───────────┬───────────┬───────────┐
+ * │delayed time│ first pos │ last pos  │    num    │   magic   │
+ * ├────────────┼───────────┼───────────┼───────────┼───────────┤
+ * │   8bytes   │   8bytes  │  8bytes   │   4bytes  │   4bytes  │
+ * └────────────┴───────────┴───────────┴───────────┴───────────┘
+ */
 public class Slot {
     public static final short SIZE = 32;
-    public final long timeMs;
+    public final long timeMs; //delayed time
     public final long firstPos;
     public final long lastPos;
     public final int num;