Cancel WebAsyncManager thread on request timeout

Issue: SPR-15852

spring-web/src/test/java/org/springframework/web/context/request/async/WebAsyncManagerTimeoutTests.java

@@ -17,6 +17,7 @@
 package org.springframework.web.context.request.async;
 
 import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
 import javax.servlet.AsyncEvent;
 
 import org.junit.Before;
@@ -30,9 +31,12 @@ import org.springframework.web.context.request.NativeWebRequest;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.BDDMockito.mock;
 import static org.mockito.BDDMockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.when;
 import static org.springframework.web.context.request.async.CallableProcessingInterceptor.RESULT_NONE;
 
 /**
@@ -151,6 +155,27 @@ public class WebAsyncManagerTimeoutTests {
 		verify(interceptor).beforeConcurrentHandling(this.asyncWebRequest, callable);
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void startCallableProcessingTimeoutAndCheckThreadInterrupted() throws Exception {
+
+		StubCallable callable = new StubCallable();
+		Future future = mock(Future.class);
+
+		AsyncTaskExecutor executor = mock(AsyncTaskExecutor.class);
+		when(executor.submit(any(Runnable.class))).thenReturn(future);
+
+		this.asyncManager.setTaskExecutor(executor);
+		this.asyncManager.startCallableProcessing(callable);
+
+		this.asyncWebRequest.onTimeout(ASYNC_EVENT);
+
+		assertTrue(this.asyncManager.hasConcurrentResult());
+
+		verify(future).cancel(true);
+		verifyNoMoreInteractions(future);
+	}
+
 	@Test
 	public void startDeferredResultProcessingTimeoutAndComplete() throws Exception {