diff --git a/spring-web/src/main/java/org/springframework/http/server/reactive/AbstractServerHttpRequest.java b/spring-web/src/main/java/org/springframework/http/server/reactive/AbstractServerHttpRequest.java
index 3b8bb8ad704..6c0ac9374e0 100644
--- a/spring-web/src/main/java/org/springframework/http/server/reactive/AbstractServerHttpRequest.java
+++ b/spring-web/src/main/java/org/springframework/http/server/reactive/AbstractServerHttpRequest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -218,9 +218,18 @@ public abstract class AbstractServerHttpRequest implements ServerHttpRequest {
 	 */
 	String getLogPrefix() {
 		if (this.logPrefix == null) {
-			this.logPrefix = "[" + getId() + "] ";
+			this.logPrefix = "[" + initLogPrefix() + "] ";
 		}
 		return this.logPrefix;
 	}
 
+	/**
+	 * Subclasses can override this to provide the prefix to use for log messages.
+	 * <p>By default, this is {@link #getId()}.
+	 * @since 5.3.15
+	 */
+	protected String initLogPrefix() {
+		return getId();
+	}
+
 }
diff --git a/spring-web/src/main/java/org/springframework/http/server/reactive/ReactorServerHttpRequest.java b/spring-web/src/main/java/org/springframework/http/server/reactive/ReactorServerHttpRequest.java
index 35db4de36c8..72cdc1f9fc2 100644
--- a/spring-web/src/main/java/org/springframework/http/server/reactive/ReactorServerHttpRequest.java
+++ b/spring-web/src/main/java/org/springframework/http/server/reactive/ReactorServerHttpRequest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -77,7 +77,7 @@ class ReactorServerHttpRequest extends AbstractServerHttpRequest {
 
 	private static URI initUri(HttpServerRequest request) throws URISyntaxException {
 		Assert.notNull(request, "HttpServerRequest must not be null");
-		return new URI(resolveBaseUrl(request).toString() + resolveRequestUri(request));
+		return new URI(resolveBaseUrl(request) + resolveRequestUri(request));
 	}
 
 	private static URI resolveBaseUrl(HttpServerRequest request) throws URISyntaxException {
@@ -197,9 +197,6 @@ class ReactorServerHttpRequest extends AbstractServerHttpRequest {
 	@Override
 	@Nullable
 	protected String initId() {
-		if (reactorNettyRequestChannelOperationsIdPresent) {
-			return (ChannelOperationsIdHelper.getId(this.request));
-		}
 		if (this.request instanceof Connection) {
 			return ((Connection) this.request).channel().id().asShortText() +
 					"-" + logPrefixIndex.incrementAndGet();
@@ -207,6 +204,21 @@ class ReactorServerHttpRequest extends AbstractServerHttpRequest {
 		return null;
 	}
 
+	@Override
+	protected String initLogPrefix() {
+		if (reactorNettyRequestChannelOperationsIdPresent) {
+			String id = (ChannelOperationsIdHelper.getId(this.request));
+			if (id != null) {
+				return id;
+			}
+		}
+		if (this.request instanceof Connection) {
+			return ((Connection) this.request).channel().id().asShortText() +
+					"-" + logPrefixIndex.incrementAndGet();
+		}
+		return getId();
+	}
+
 
 	private static class ChannelOperationsIdHelper {