Cancel WebAsyncManager thread on request timeout

Issue: SPR-15852

spring-web/src/main/java/org/springframework/web/context/request/async/CallableInterceptorChain.java

@@ -18,6 +18,7 @@ package org.springframework.web.context.request.async;
 
 import java.util.List;
 import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -39,11 +40,19 @@ class CallableInterceptorChain {
 
 	private int preProcessIndex = -1;
 
+	private volatile Future<?> taskFuture;
+
 
 	public CallableInterceptorChain(List<CallableProcessingInterceptor> interceptors) {
 		this.interceptors = interceptors;
 	}
 
+
+	public void setTaskFuture(Future<?> taskFuture) {
+		this.taskFuture = taskFuture;
+	}
+
+
 	public void applyBeforeConcurrentHandling(NativeWebRequest request, Callable<?> task) throws Exception {
 		for (CallableProcessingInterceptor interceptor : this.interceptors) {
 			interceptor.beforeConcurrentHandling(request, task);
@@ -77,6 +86,7 @@ class CallableInterceptorChain {
 	}
 
 	public Object triggerAfterTimeout(NativeWebRequest request, Callable<?> task) {
+		cancelTask();
 		for (CallableProcessingInterceptor interceptor : this.interceptors) {
 			try {
 				Object result = interceptor.handleTimeout(request, task);
@@ -94,6 +104,18 @@ class CallableInterceptorChain {
 		return CallableProcessingInterceptor.RESULT_NONE;
 	}
 
+	private void cancelTask() {
+		Future<?> future = this.taskFuture;
+		if (future != null) {
+			try {
+				future.cancel(true);
+			}
+			catch (Throwable ex) {
+				// Ignore
+			}
+		}
+	}
+
 	public void triggerAfterCompletion(NativeWebRequest request, Callable<?> task) {
 		for (int i = this.interceptors.size()-1; i >= 0; i--) {
 			try {

spring-web/src/main/java/org/springframework/web/context/request/async/WebAsyncManager.java

@@ -21,6 +21,7 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
 import java.util.concurrent.RejectedExecutionException;
 import javax.servlet.http.HttpServletRequest;
 
@@ -307,7 +308,7 @@ public final class WebAsyncManager {
 		interceptorChain.applyBeforeConcurrentHandling(this.asyncWebRequest, callable);
 		startAsyncProcessing(processingContext);
 		try {
-			this.taskExecutor.submit(new Runnable() {
+			Future<?> future = this.taskExecutor.submit(new Runnable() {
 				@Override
 				public void run() {
 					Object result = null;
@@ -324,6 +325,7 @@ public final class WebAsyncManager {
 					setConcurrentResultAndDispatch(result);
 				}
 			});
+			interceptorChain.setTaskFuture(future);
 		}
 		catch (RejectedExecutionException ex) {
 			Object result = interceptorChain.applyPostProcess(this.asyncWebRequest, callable, ex);