Remove Devtools remote debugging support

Closes gh-9489

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/RemoteSpringApplication.java

@@ -38,10 +38,9 @@ import org.springframework.core.io.ClassPathResource;
 
 /**
  * Application that can be used to establish a link to remotely running Spring Boot code.
- * Allows remote debugging and remote updates (if enabled). This class should be launched
- * from within your IDE and should have the same classpath configuration as the locally
- * developed application. The remote URL of the application should be provided as a
- * non-option argument.
+ * Allows remote updates (if enabled). This class should be launched from within your IDE
+ * and should have the same classpath configuration as the locally developed application.
+ * The remote URL of the application should be provided as a non-option argument.
  *
  * @author Phillip Webb
  * @since 1.3.0

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/RemoteDevToolsAutoConfiguration.java

@@ -24,7 +24,6 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
@@ -45,10 +44,6 @@ import org.springframework.boot.devtools.restart.server.DefaultSourceFolderUrlFi
 import org.springframework.boot.devtools.restart.server.HttpRestartServer;
 import org.springframework.boot.devtools.restart.server.HttpRestartServerHandler;
 import org.springframework.boot.devtools.restart.server.SourceFolderUrlFilter;
-import org.springframework.boot.devtools.tunnel.server.HttpTunnelServer;
-import org.springframework.boot.devtools.tunnel.server.HttpTunnelServerHandler;
-import org.springframework.boot.devtools.tunnel.server.RemoteDebugPortProvider;
-import org.springframework.boot.devtools.tunnel.server.SocketTargetServerConnection;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.annotation.Order;
@@ -148,39 +143,6 @@ public class RemoteDevToolsAutoConfiguration {
 
 	}
 
-	/**
-	 * Configuration for remote debug HTTP tunneling.
-	 */
-	@ConditionalOnProperty(prefix = "spring.devtools.remote.debug", name = "enabled", matchIfMissing = true)
-	static class RemoteDebugTunnelConfiguration {
-
-		@Autowired
-		private DevToolsProperties properties;
-
-		@Autowired
-		private ServerProperties serverProperties;
-
-		@Bean
-		@ConditionalOnMissingBean(name = "remoteDebugHandlerMapper")
-		public UrlHandlerMapper remoteDebugHandlerMapper(
-				@Qualifier("remoteDebugHttpTunnelServer") HttpTunnelServer server) {
-			String url = (this.serverProperties.getServlet().getContextPath() == null ? ""
-					: this.serverProperties.getServlet().getContextPath())
-					+ this.properties.getRemote().getContextPath() + "/debug";
-			logger.warn("Listening for remote debug traffic on " + url);
-			Handler handler = new HttpTunnelServerHandler(server);
-			return new UrlHandlerMapper(url, handler);
-		}
-
-		@Bean
-		@ConditionalOnMissingBean(name = "remoteDebugHttpTunnelServer")
-		public HttpTunnelServer remoteDebugHttpTunnelServer() {
-			return new HttpTunnelServer(
-					new SocketTargetServerConnection(new RemoteDebugPortProvider()));
-		}
-
-	}
-
 	@Configuration
 	@ConditionalOnClass(WebSecurityConfigurerAdapter.class)
 	@ConditionalOnBean(ObjectPostProcessor.class)

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/RemoteDevToolsProperties.java

 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -48,8 +48,6 @@ public class RemoteDevToolsProperties {
 
 	private Restart restart = new Restart();
 
-	private Debug debug = new Debug();
-
 	private Proxy proxy = new Proxy();
 
 	public String getContextPath() {
@@ -80,10 +78,6 @@ public class RemoteDevToolsProperties {
 		return this.restart;
 	}
 
-	public Debug getDebug() {
-		return this.debug;
-	}
-
 	public Proxy getProxy() {
 		return this.proxy;
 	}
@@ -105,38 +99,6 @@ public class RemoteDevToolsProperties {
 
 	}
 
-	public static class Debug {
-
-		public static final Integer DEFAULT_LOCAL_PORT = 8000;
-
-		/**
-		 * Enable remote debug support.
-		 */
-		private boolean enabled = true;
-
-		/**
-		 * Local remote debug server port.
-		 */
-		private int localPort = DEFAULT_LOCAL_PORT;
-
-		public boolean isEnabled() {
-			return this.enabled;
-		}
-
-		public void setEnabled(boolean enabled) {
-			this.enabled = enabled;
-		}
-
-		public int getLocalPort() {
-			return this.localPort;
-		}
-
-		public void setLocalPort(int localPort) {
-			this.localPort = localPort;
-		}
-
-	}
-
 	public static class Proxy {
 
 		/**

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/remote/client/LocalDebugPortAvailableCondition.java

-/*
- * Copyright 2012-2017 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.devtools.remote.client;
-
-import javax.net.ServerSocketFactory;
-
-import org.springframework.boot.autoconfigure.condition.ConditionMessage;
-import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
-import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
-import org.springframework.boot.devtools.autoconfigure.RemoteDevToolsProperties;
-import org.springframework.context.annotation.ConditionContext;
-import org.springframework.core.type.AnnotatedTypeMetadata;
-
-/**
- * Condition used to check that the actual local port is available.
- *
- * @author Phillip Webb
- * @author Madhura Bhave
- */
-class LocalDebugPortAvailableCondition extends SpringBootCondition {
-
-	@Override
-	public ConditionOutcome getMatchOutcome(ConditionContext context,
-			AnnotatedTypeMetadata metadata) {
-		ConditionMessage.Builder message = ConditionMessage
-				.forCondition("Local Debug Port Condition");
-		Integer port = context.getEnvironment().getProperty(
-				"spring.devtools.remote.debug.local-port", Integer.class,
-				RemoteDevToolsProperties.Debug.DEFAULT_LOCAL_PORT);
-		if (isPortAvailable(port)) {
-			return ConditionOutcome.match(message.foundExactly("local debug port"));
-		}
-		return ConditionOutcome.noMatch(message.didNotFind("local debug port").atAll());
-	}
-
-	private boolean isPortAvailable(int port) {
-		try {
-			ServerSocketFactory.getDefault().createServerSocket(port).close();
-			return true;
-		}
-		catch (Exception ex) {
-			return false;
-		}
-	}
-
-}

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/remote/client/LoggingTunnelClientListener.java

-/*
- * Copyright 2012-2015 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.devtools.remote.client;
-
-import java.nio.channels.SocketChannel;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-import org.springframework.boot.devtools.tunnel.client.TunnelClientListener;
-
-/**
- * {@link TunnelClientListener} to log open/close events.
- *
- * @author Phillip Webb
- */
-class LoggingTunnelClientListener implements TunnelClientListener {
-
-	private static final Log logger = LogFactory
-			.getLog(LoggingTunnelClientListener.class);
-
-	@Override
-	public void onOpen(SocketChannel socket) {
-		logger.info("Remote debug connection opened");
-	}
-
-	@Override
-	public void onClose(SocketChannel socket) {
-		logger.info("Remote debug connection closed");
-	}
-
-}

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/remote/client/RemoteClientConfiguration.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -25,14 +25,12 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
 import javax.annotation.PostConstruct;
-import javax.servlet.Filter;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -52,11 +50,7 @@ import org.springframework.boot.devtools.livereload.LiveReloadServer;
 import org.springframework.boot.devtools.restart.DefaultRestartInitializer;
 import org.springframework.boot.devtools.restart.RestartScope;
 import org.springframework.boot.devtools.restart.Restarter;
-import org.springframework.boot.devtools.tunnel.client.HttpTunnelConnection;
-import org.springframework.boot.devtools.tunnel.client.TunnelClient;
-import org.springframework.boot.devtools.tunnel.client.TunnelConnection;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.event.EventListener;
 import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
@@ -120,9 +114,8 @@ public class RemoteClientConfiguration {
 	@PostConstruct
 	private void logWarnings() {
 		RemoteDevToolsProperties remoteProperties = this.properties.getRemote();
-		if (!remoteProperties.getDebug().isEnabled()
-				&& !remoteProperties.getRestart().isEnabled()) {
-			logger.warn("Remote restart and debug are both disabled.");
+		if (!remoteProperties.getRestart().isEnabled()) {
+			logger.warn("Remote restart is disabled.");
 		}
 		if (!this.remoteUrl.startsWith("https://")) {
 			logger.warn("The connection to " + this.remoteUrl
@@ -239,32 +232,4 @@ public class RemoteClientConfiguration {
 
 	}
 
-	/**
-	 * Client configuration for remote debug HTTP tunneling.
-	 */
-	@ConditionalOnProperty(prefix = "spring.devtools.remote.debug", name = "enabled", matchIfMissing = true)
-	@ConditionalOnClass(Filter.class)
-	@Conditional(LocalDebugPortAvailableCondition.class)
-	static class RemoteDebugTunnelClientConfiguration {
-
-		@Autowired
-		private DevToolsProperties properties;
-
-		@Value("${remoteUrl}")
-		private String remoteUrl;
-
-		@Bean
-		public TunnelClient remoteDebugTunnelClient(
-				ClientHttpRequestFactory requestFactory) {
-			RemoteDevToolsProperties remoteProperties = this.properties.getRemote();
-			String url = this.remoteUrl + remoteProperties.getContextPath() + "/debug";
-			TunnelConnection connection = new HttpTunnelConnection(url, requestFactory);
-			int localPort = remoteProperties.getDebug().getLocalPort();
-			TunnelClient client = new TunnelClient(localPort, connection);
-			client.addListener(new LoggingTunnelClientListener());
-			return client;
-		}
-
-	}
-
 }

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/tunnel/client/HttpTunnelConnection.java

 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -196,12 +196,6 @@ public class HttpTunnelConnection implements TunnelConnection {
 				close();
 				return;
 			}
-			if (response.getStatusCode() == HttpStatus.SERVICE_UNAVAILABLE) {
-				logger.warn("Remote application responded with service unavailable. Did "
-						+ "you forget to start it with remote debugging enabled?");
-				close();
-				return;
-			}
 			if (response.getStatusCode() == HttpStatus.OK) {
 				HttpTunnelPayload payload = HttpTunnelPayload.get(response);
 				if (payload != null) {

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/tunnel/server/HttpTunnelServer.java

@@ -158,9 +158,6 @@ public class HttpTunnelServer {
 		catch (ConnectException ex) {
 			httpConnection.respond(HttpStatus.GONE);
 		}
-		catch (RemoteDebugNotRunningException ex) {
-			httpConnection.respond(HttpStatus.SERVICE_UNAVAILABLE);
-		}
 	}
 
 	/**

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/tunnel/server/RemoteDebugNotRunningException.java

-/*
- * Copyright 2012-2016 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.devtools.tunnel.server;
-
-/**
- * Exception thrown to indicate that remote debug is not running.
- *
- * @author Andy Wilkinson
- */
-class RemoteDebugNotRunningException extends RuntimeException {
-
-}

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/tunnel/server/RemoteDebugPortProvider.java

-/*
- * Copyright 2012-2016 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.devtools.tunnel.server;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-import org.springframework.boot.lang.UsesUnsafeJava;
-
-/**
- * {@link PortProvider} that provides the port being used by the Java remote debugging.
- *
- * @author Phillip Webb
- * @author Andy Wilkinson
- */
-public class RemoteDebugPortProvider implements PortProvider {
-
-	private static final String JDWP_ADDRESS_PROPERTY = "sun.jdwp.listenerAddress";
-
-	private static final Log logger = LogFactory.getLog(RemoteDebugPortProvider.class);
-
-	@Override
-	public int getPort() {
-		if (!isRemoteDebugRunning()) {
-			throw new RemoteDebugNotRunningException();
-		}
-		return getRemoteDebugPort();
-	}
-
-	public static boolean isRemoteDebugRunning() {
-		return getRemoteDebugPort() != -1;
-	}
-
-	@UsesUnsafeJava
-	@SuppressWarnings("restriction")
-	private static int getRemoteDebugPort() {
-		String property = sun.misc.VMSupport.getAgentProperties()
-				.getProperty(JDWP_ADDRESS_PROPERTY);
-		try {
-			if (property != null && property.contains(":")) {
-				return Integer.valueOf(property.split(":")[1]);
-			}
-		}
-		catch (Exception ex) {
-			logger.trace(
-					"Unable to get JDWP port from property value '" + property + "'");
-		}
-		return -1;
-	}
-
-}

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/autoconfigure/RemoteDevToolsAutoConfigurationTests.java

@@ -31,8 +31,6 @@ import org.springframework.boot.devtools.restart.MockRestarter;
 import org.springframework.boot.devtools.restart.server.HttpRestartServer;
 import org.springframework.boot.devtools.restart.server.SourceFolderUrlFilter;
 import org.springframework.boot.devtools.tunnel.server.HttpTunnelServer;
-import org.springframework.boot.devtools.tunnel.server.RemoteDebugPortProvider;
-import org.springframework.boot.devtools.tunnel.server.SocketTargetServerConnection;
 import org.springframework.boot.devtools.tunnel.server.TargetServerConnection;
 import org.springframework.boot.test.util.TestPropertyValues;
 import org.springframework.context.annotation.Bean;
@@ -154,46 +152,6 @@ public class RemoteDevToolsAutoConfigurationTests {
 		this.context.getBean("remoteRestartHandlerMapper");
 	}
 
-	@Test
-	public void invokeTunnelWithDefaultSetup() throws Exception {
-		loadContext("spring.devtools.remote.secret:supersecret");
-		DispatcherFilter filter = this.context.getBean(DispatcherFilter.class);
-		this.request.setRequestURI(DEFAULT_CONTEXT_PATH + "/debug");
-		this.request.addHeader(DEFAULT_SECRET_HEADER_NAME, "supersecret");
-		filter.doFilter(this.request, this.response, this.chain);
-		assertTunnelInvoked(true);
-	}
-
-	@Test
-	public void invokeTunnelWithCustomServerContextPath() throws Exception {
-		loadContext("spring.devtools.remote.secret:supersecret",
-				"server.servlet.context-path:/test");
-		DispatcherFilter filter = this.context.getBean(DispatcherFilter.class);
-		this.request.setRequestURI("/test" + DEFAULT_CONTEXT_PATH + "/debug");
-		this.request.addHeader(DEFAULT_SECRET_HEADER_NAME, "supersecret");
-		filter.doFilter(this.request, this.response, this.chain);
-		assertTunnelInvoked(true);
-	}
-
-	@Test
-	public void invokeTunnelWithCustomHeaderName() throws Exception {
-		loadContext("spring.devtools.remote.secret:supersecret",
-				"spring.devtools.remote.secretHeaderName:customheader");
-		DispatcherFilter filter = this.context.getBean(DispatcherFilter.class);
-		this.request.setRequestURI(DEFAULT_CONTEXT_PATH + "/debug");
-		this.request.addHeader("customheader", "supersecret");
-		filter.doFilter(this.request, this.response, this.chain);
-		assertTunnelInvoked(true);
-	}
-
-	@Test
-	public void disableRemoteDebug() throws Exception {
-		loadContext("spring.devtools.remote.secret:supersecret",
-				"spring.devtools.remote.debug.enabled:false");
-		this.thrown.expect(NoSuchBeanDefinitionException.class);
-		this.context.getBean("remoteDebugHandlerMapper");
-	}
-
 	@Test
 	public void devToolsHealthReturns200() throws Exception {
 		loadContext("spring.devtools.remote.secret:supersecret");
@@ -239,12 +197,6 @@ public class RemoteDevToolsAutoConfigurationTests {
 	@Import(RemoteDevToolsAutoConfiguration.class)
 	static class Config {
 
-		@Bean
-		public HttpTunnelServer remoteDebugHttpTunnelServer() {
-			return new MockHttpTunnelServer(
-					new SocketTargetServerConnection(new RemoteDebugPortProvider()));
-		}
-
 		@Bean
 		public HttpRestartServer remoteRestartHttpRestartServer() {
 			SourceFolderUrlFilter sourceFolderUrlFilter = mock(

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/remote/client/LocalDebugPortAvailableConditionTests.java

-/*
- * Copyright 2012-2017 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.devtools.remote.client;
-
-import java.net.ServerSocket;
-
-import javax.net.ServerSocketFactory;
-
-import org.junit.Test;
-
-import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
-import org.springframework.boot.test.util.TestPropertyValues;
-import org.springframework.context.annotation.ConditionContext;
-import org.springframework.mock.env.MockEnvironment;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.mockito.BDDMockito.given;
-import static org.mockito.Mockito.mock;
-
-/**
- * Tests for {@link LocalDebugPortAvailableCondition}.
- *
- * @author Phillip Webb
- */
-public class LocalDebugPortAvailableConditionTests {
-
-	private LocalDebugPortAvailableCondition condition = new LocalDebugPortAvailableCondition();
-
-	@Test
-	public void portAvailable() throws Exception {
-		ConditionOutcome outcome = getOutcome(0);
-		assertThat(outcome.isMatch()).isTrue();
-		assertThat(outcome.getMessage())
-				.isEqualTo("Local Debug Port Condition found local debug port");
-	}
-
-	@Test
-	public void portInUse() throws Exception {
-		ServerSocket serverSocket = ServerSocketFactory.getDefault()
-				.createServerSocket(0);
-		ConditionOutcome outcome = getOutcome(serverSocket.getLocalPort());
-		serverSocket.close();
-		assertThat(outcome.isMatch()).isFalse();
-		assertThat(outcome.getMessage())
-				.isEqualTo("Local Debug Port Condition did not find local debug port");
-	}
-
-	private ConditionOutcome getOutcome(int port) {
-		MockEnvironment environment = new MockEnvironment();
-		TestPropertyValues.of("spring.devtools.remote.debug.local-port:" + port)
-				.applyTo(environment);
-		ConditionContext context = mock(ConditionContext.class);
-		given(context.getEnvironment()).willReturn(environment);
-		ConditionOutcome outcome = this.condition.getMatchOutcome(context, null);
-		return outcome;
-	}
-
-}

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/remote/client/RemoteClientConfigurationTests.java

@@ -38,7 +38,6 @@ import org.springframework.boot.devtools.remote.server.Dispatcher;
 import org.springframework.boot.devtools.remote.server.DispatcherFilter;
 import org.springframework.boot.devtools.restart.MockRestarter;
 import org.springframework.boot.devtools.restart.RestartScopeInitializer;
-import org.springframework.boot.devtools.tunnel.client.TunnelClient;
 import org.springframework.boot.test.rule.OutputCapture;
 import org.springframework.boot.test.util.TestPropertyValues;
 import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
@@ -86,11 +85,10 @@ public class RemoteClientConfigurationTests {
 	}
 
 	@Test
-	public void warnIfDebugAndRestartDisabled() throws Exception {
-		configure("spring.devtools.remote.debug.enabled:false",
-				"spring.devtools.remote.restart.enabled:false");
+	public void warnIfRestartDisabled() throws Exception {
+		configure("spring.devtools.remote.restart.enabled:false");
 		assertThat(this.output.toString())
-				.contains("Remote restart and debug are both disabled");
+				.contains("Remote restart is disabled");
 	}
 
 	@Test
@@ -140,13 +138,6 @@ public class RemoteClientConfigurationTests {
 		this.context.getBean(ClassPathFileSystemWatcher.class);
 	}
 
-	@Test
-	public void remoteDebugDisabled() throws Exception {
-		configure("spring.devtools.remote.debug.enabled:false");
-		this.thrown.expect(NoSuchBeanDefinitionException.class);
-		this.context.getBean(TunnelClient.class);
-	}
-
 	private void configure(String... pairs) {
 		configure("http://localhost", true, pairs);
 	}

spring-boot-devtools/src/test/java/org/springframework/boot/devtools/tunnel/client/HttpTunnelConnectionTests.java

@@ -146,15 +146,6 @@ public class HttpTunnelConnectionTests {
 		assertThat(this.requestFactory.getExecutedRequests().size()).isGreaterThan(10);
 	}
 
-	@Test
-	public void serviceUnavailableResponseLogsWarningAndClosesTunnel() throws Exception {
-		this.requestFactory.willRespond(HttpStatus.SERVICE_UNAVAILABLE);
-		TunnelChannel tunnel = openTunnel(true);
-		assertThat(tunnel.isOpen()).isFalse();
-		this.outputCapture.expect(containsString(
-				"Did you forget to start it with remote debugging enabled?"));
-	}
-
 	@Test
 	public void connectFailureLogsWarning() throws Exception {
 		this.requestFactory.willRespond(new ConnectException());

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -1265,8 +1265,6 @@ content into your application; rather pick only the properties that you need.
 
 	# REMOTE DEVTOOLS ({sc-spring-boot-devtools}/autoconfigure/RemoteDevToolsProperties.{sc-ext}[RemoteDevToolsProperties])
 	spring.devtools.remote.context-path=/.~~spring-boot!~ # Context path used to handle the remote connection.
-	spring.devtools.remote.debug.enabled=true # Enable remote debug support.
-	spring.devtools.remote.debug.local-port=8000 # Local remote debug server port.
 	spring.devtools.remote.proxy.host= # The host of the proxy to use to connect to the remote application.
 	spring.devtools.remote.proxy.port= # The port of the proxy to use to connect to the remote application.
 	spring.devtools.remote.restart.enabled=true # Enable remote restart.

spring-boot-docs/src/main/asciidoc/using-spring-boot.adoc

@@ -1047,49 +1047,6 @@ before starting the remote client, it won't be pushed to the remote server.
 
 
 
-[[using-boot-devtools-remote-debugtunnel]]
-==== Remote debug tunnel
-Java remote debugging is useful when diagnosing issues on a remote application.
-Unfortunately, it's not always possible to enable remote debugging when your application
-is deployed outside of your data center. Remote debugging can also be tricky to setup if
-you are using a container based technology such as Docker.
-
-To help work around these limitations, devtools supports tunneling of remote debug traffic
-over HTTP. The remote client provides a local server on port `8000` that you can attach
-a remote debugger to. Once a connection is established, debug traffic is sent over HTTP
-to the remote application. You can use the `spring.devtools.remote.debug.local-port`
-property if you want to use a different port.
-
-You'll need to ensure that your remote application is started with remote debugging
-enabled. Often this can be achieved by configuring `JAVA_OPTS`. For example, with
-Cloud Foundry you can add the following to your `manifest.yml`:
-
-[source,yaml,indent=0]
-----
-	---
-		env:
-			JAVA_OPTS: "-Xdebug -Xrunjdwp:server=y,transport=dt_socket,suspend=n"
-----
-
-TIP: Notice that you don't need to pass an `address=NNNN` option to `-Xrunjdwp`. If
-omitted Java will simply pick a random free port.
-
-NOTE: Debugging a remote service over the Internet can be slow and you might need to
-increase timeouts in your IDE. For example, in Eclipse you can select `Java` -> `Debug`
-from `Preferences...` and change the `Debugger timeout (ms)` to a more suitable value
-(`60000` works well in most situations).
-
-WARNING: When using the remote debug tunnel with IntelliJ IDEA, all breakpoints must be
-configured to suspend the thread rather than the VM. By default, breakpoints in IntelliJ
-IDEA suspend the entire VM rather than only suspending the thread that hit the
-breakpoint. This has the unwanted side-effect of suspending the thread that manages the
-remote debug tunnel, causing your debugging session to freeze. When using the remote
-debug tunnel with IntelliJ IDEA, all breakpoints should be configured to suspend the
-thread rather than the VM. Please see
-https://youtrack.jetbrains.com/issue/IDEA-165769[IDEA-165769] for further details.
-
-
-
 [[using-boot-packaging-for-production]]
 == Packaging your application for production
 Executable jars can be used for production deployment. As they are self-contained, they