Merge branch '6.1.x'

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/DefaultServerRequest.java

@@ -337,6 +337,7 @@ class DefaultServerRequest implements ServerRequest {
 		}
 
 		@Override
+		@Nullable
 		public InetSocketAddress host() {
 			return this.httpHeaders.getHost();
 		}

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ServerWebExchangeMethodArgumentResolver.java

@@ -80,6 +80,7 @@ public class ServerWebExchangeMethodArgumentResolver extends HandlerMethodArgume
 	}
 
 	@Override
+	@Nullable
 	public Object resolveArgumentValue(
 			MethodParameter methodParameter, BindingContext context, ServerWebExchange exchange) {
 

spring-webflux/src/main/java/org/springframework/web/reactive/socket/server/support/HandshakeWebSocketServiceRuntimeHints.java

@@ -19,6 +19,7 @@ package org.springframework.web.reactive.socket.server.support;
 import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.lang.Nullable;
 
 /**
  * {@link RuntimeHintsRegistrar} implementation that registers reflection hints related to
@@ -30,7 +31,7 @@ import org.springframework.aot.hint.RuntimeHintsRegistrar;
 class HandshakeWebSocketServiceRuntimeHints implements RuntimeHintsRegistrar {
 
 	@Override
-	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+	public void registerHints(RuntimeHints hints, @Nullable ClassLoader classLoader) {
 		hints.reflection().registerType(HandshakeWebSocketService.initUpgradeStrategy().getClass(),
 				MemberCategory.INVOKE_DECLARED_CONSTRUCTORS);
 	}