Auto-configured WebClient no longer uses context's ReactorResourceFactory

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/http/client/reactive/ClientHttpConnectorAutoConfiguration.java

@@ -31,13 +31,16 @@
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.http.client.reactive.ClientHttpConnectorBuilder;
 import org.springframework.boot.http.client.reactive.ClientHttpConnectorSettings;
+import org.springframework.boot.http.client.reactive.ReactorClientHttpConnectorBuilder;
 import org.springframework.boot.ssl.SslBundles;
 import org.springframework.boot.util.LambdaSafe;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.context.annotation.Lazy;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.client.ReactorResourceFactory;
 import org.springframework.http.client.reactive.ClientHttpConnector;
 
 /**
@@ -103,6 +106,13 @@ ClientHttpConnector clientHttpConnector(ClientHttpConnectorBuilder<?> clientHttp
 	@Import(ReactorNettyConfigurations.ReactorResourceFactoryConfiguration.class)
 	static class ReactorNetty {
 
+		@Bean
+		@Order(0)
+		ClientHttpConnectorBuilderCustomizer<ReactorClientHttpConnectorBuilder> reactorResourceFactoryClientHttpConnectorBuilderCustomizer(
+				ReactorResourceFactory reactorResourceFactory) {
+			return (builder) -> builder.withReactorResourceFactory(reactorResourceFactory);
+		}
+
 	}
 
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/function/client/ClientHttpConnectorAutoConfiguration.java

@@ -25,13 +25,10 @@
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.http.client.reactive.ClientHttpConnectorBuilderCustomizer;
-import org.springframework.boot.autoconfigure.reactor.netty.ReactorNettyConfigurations.ReactorResourceFactoryConfiguration;
 import org.springframework.boot.http.client.reactive.ReactorClientHttpConnectorBuilder;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Import;
 import org.springframework.core.annotation.Order;
-import org.springframework.http.client.ReactorResourceFactory;
 import org.springframework.web.reactive.function.client.WebClient;
 
 /**
@@ -52,14 +49,12 @@ public class ClientHttpConnectorAutoConfiguration {
 
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(HttpClient.class)
-	@Import(ReactorResourceFactoryConfiguration.class)
 	@SuppressWarnings("removal")
 	static class ReactorNetty {
 
 		@Bean
 		@Order(0)
 		ClientHttpConnectorBuilderCustomizer<ReactorClientHttpConnectorBuilder> reactorNettyHttpClientMapperClientHttpConnectorBuilderCustomizer(
-				ReactorResourceFactory reactorResourceFactory,
 				ObjectProvider<ReactorNettyHttpClientMapper> mapperProvider) {
 			return applyMappers(mapperProvider.orderedStream().toList());
 		}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/http/client/reactive/ClientHttpConnectorAutoConfigurationTests.java

@@ -23,6 +23,7 @@
 import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
 import org.junit.jupiter.api.Test;
 import reactor.netty.http.client.HttpClient;
+import reactor.netty.resources.LoopResources;
 
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
@@ -114,6 +115,21 @@ void shouldUseCustomReactorResourceFactory() {
 			assertThat(context).hasSingleBean(ClientHttpConnector.class);
 			assertThat(context).hasSingleBean(ReactorResourceFactory.class);
 			assertThat(context).hasBean("customReactorResourceFactory");
+			ClientHttpConnector connector = context.getBean(ClientHttpConnector.class);
+			assertThat(connector).extracting("httpClient.config.loopResources")
+				.isEqualTo(context.getBean("customReactorResourceFactory", ReactorResourceFactory.class)
+					.getLoopResources());
+		});
+	}
+
+	@Test
+	void shouldUseReactorResourceFactory() {
+		this.contextRunner.run((context) -> {
+			assertThat(context).hasSingleBean(ClientHttpConnector.class);
+			assertThat(context).hasSingleBean(ReactorResourceFactory.class);
+			ClientHttpConnector connector = context.getBean(ClientHttpConnector.class);
+			assertThat(connector).extracting("httpClient.config.loopResources")
+				.isEqualTo(context.getBean(ReactorResourceFactory.class).getLoopResources());
 		});
 	}
 
@@ -190,7 +206,10 @@ static class CustomReactorResourceConfig {
 
 		@Bean
 		ReactorResourceFactory customReactorResourceFactory() {
-			return new ReactorResourceFactory();
+			ReactorResourceFactory reactorResourceFactory = new ReactorResourceFactory();
+			reactorResourceFactory.setUseGlobalResources(false);
+			reactorResourceFactory.setLoopResources(LoopResources.create("custom-loop", 1, true));
+			return reactorResourceFactory;
 		}
 
 	}