a4743c
@@ -105,7 +105,6 @@
public final class WebAsyncManager {
 	 */
 	public void setAsyncWebRequest(final AsyncWebRequest asyncWebRequest) {
 		Assert.notNull(asyncWebRequest, "AsyncWebRequest must not be null");
-		Assert.state(!isConcurrentHandlingStarted(), "Can't set AsyncWebRequest with concurrent handling in progress");
 		this.asyncWebRequest = asyncWebRequest;
 		this.asyncWebRequest.addCompletionHandler(new Runnable() {
 			@Override
