Ignore management.server.port for war

Fixes gh-14148

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/web/server/ManagementContextAutoConfiguration.java

@@ -16,6 +16,9 @@
 
 package org.springframework.boot.actuate.autoconfigure.web.server;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
 import org.springframework.beans.factory.SmartInitializingSingleton;
 import org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointProperties;
 import org.springframework.boot.actuate.autoconfigure.web.ManagementContextFactory;
@@ -26,6 +29,7 @@ import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoCon
 import org.springframework.boot.context.event.ApplicationFailedEvent;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.web.context.ConfigurableWebServerApplicationContext;
+import org.springframework.boot.web.context.WebServerApplicationContext;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
@@ -55,6 +59,9 @@ import org.springframework.util.Assert;
 		ManagementServerProperties.class })
 public class ManagementContextAutoConfiguration {
 
+	private static final Log logger = LogFactory
+			.getLog(ManagementContextAutoConfiguration.class);
+
 	@Configuration
 	@ConditionalOnManagementPort(ManagementPortType.SAME)
 	static class SameManagementContextConfiguration
@@ -129,16 +136,25 @@ public class ManagementContextAutoConfiguration {
 
 		@Override
 		public void afterSingletonsInstantiated() {
-			ConfigurableWebServerApplicationContext managementContext = this.managementContextFactory
-					.createManagementContext(this.applicationContext,
-							EnableChildManagementContextConfiguration.class,
-							PropertyPlaceholderAutoConfiguration.class);
-			managementContext.setServerNamespace("management");
-			managementContext.setId(this.applicationContext.getId() + ":management");
-			setClassLoaderIfPossible(managementContext);
-			CloseManagementContextListener.addIfPossible(this.applicationContext,
-					managementContext);
-			managementContext.refresh();
+			if (this.applicationContext instanceof WebServerApplicationContext
+					&& ((WebServerApplicationContext) this.applicationContext)
+							.getWebServer() != null) {
+				ConfigurableWebServerApplicationContext managementContext = this.managementContextFactory
+						.createManagementContext(this.applicationContext,
+								EnableChildManagementContextConfiguration.class,
+								PropertyPlaceholderAutoConfiguration.class);
+				managementContext.setServerNamespace("management");
+				managementContext.setId(this.applicationContext.getId() + ":management");
+				setClassLoaderIfPossible(managementContext);
+				CloseManagementContextListener.addIfPossible(this.applicationContext,
+						managementContext);
+				managementContext.refresh();
+			}
+			else {
+				logger.warn("Could not start embedded management container on "
+						+ "different port (management endpoints are still available "
+						+ "through JMX)");
+			}
 		}
 
 		private void setClassLoaderIfPossible(ConfigurableApplicationContext child) {

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/web/server/ManagementContextAutoConfigurationTests.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2012-2018 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.boot.actuate.autoconfigure.web.server;
+
+import org.junit.Rule;
+import org.junit.Test;
+
+import org.springframework.boot.actuate.autoconfigure.endpoint.EndpointAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.endpoint.web.WebEndpointAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.web.servlet.ServletManagementContextAutoConfiguration;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration;
+import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
+import org.springframework.boot.test.rule.OutputCapture;
+import org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ManagementContextAutoConfiguration}.
+ *
+ * @author Madhura Bhave
+ */
+public class ManagementContextAutoConfigurationTests {
+
+	private WebApplicationContextRunner contextRunner = new WebApplicationContextRunner()
+			.withConfiguration(
+					AutoConfigurations.of(ManagementContextAutoConfiguration.class,
+							ServletManagementContextAutoConfiguration.class));
+
+	@Rule
+	public OutputCapture output = new OutputCapture();
+
+	@Test
+	public void managementServerPortShouldBeIgnoredForNonEmbeddedServer() {
+		this.contextRunner.withPropertyValues("management.server.port=8081")
+				.run((context) -> {
+					assertThat(context.getStartupFailure()).isNull();
+					assertThat(this.output.toString())
+							.contains("Could not start embedded management container on "
+									+ "different port (management endpoints are still available through JMX)");
+				});
+	}
+
+	@Test
+	public void childManagementContextShouldStartForEmbeddedServer() {
+		WebApplicationContextRunner contextRunner = new WebApplicationContextRunner(
+				AnnotationConfigServletWebServerApplicationContext::new)
+						.withConfiguration(AutoConfigurations.of(
+								ManagementContextAutoConfiguration.class,
+								ServletWebServerFactoryAutoConfiguration.class,
+								ServletManagementContextAutoConfiguration.class,
+								WebEndpointAutoConfiguration.class,
+								EndpointAutoConfiguration.class));
+		contextRunner.withPropertyValues("management.server.port=8081")
+				.run((context) -> assertThat(this.output.toString()).doesNotContain(
+						"Could not start embedded management container on "
+								+ "different port (management endpoints are still available through JMX)"));
+	}
+
+}