Merge branch '1.5.x'

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServer.java

@@ -159,6 +159,7 @@ public class UndertowServletWebServer implements WebServer {
 						.info("Undertow started on port(s) " + getPortsDescription());
 			}
 			catch (Exception ex) {
+				try {
 					if (findBindException(ex) != null) {
 						List<Port> failedPorts = getConfiguredPorts();
 						List<Port> actualPorts = getActualPorts();
@@ -170,6 +171,21 @@ public class UndertowServletWebServer implements WebServer {
 					}
 					throw new WebServerException("Unable to start embedded Undertow", ex);
 				}
+				finally {
+					stopSilently();
+				}
+			}
+		}
+	}
+
+	private void stopSilently() {
+		try {
+			if (this.undertow != null) {
+				this.undertow.stop();
+			}
+		}
+		catch (Exception ex) {
+			// Ignore
 		}
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowWebServer.java

@@ -88,6 +88,7 @@ public class UndertowWebServer implements WebServer {
 						.info("Undertow started on port(s) " + getPortsDescription());
 			}
 			catch (Exception ex) {
+				try {
 					if (findBindException(ex) != null) {
 						List<UndertowWebServer.Port> failedPorts = getConfiguredPorts();
 						List<UndertowWebServer.Port> actualPorts = getActualPorts();
@@ -99,6 +100,21 @@ public class UndertowWebServer implements WebServer {
 					}
 					throw new WebServerException("Unable to start embedded Undertow", ex);
 				}
+				finally {
+					stopSilently();
+				}
+			}
+		}
+	}
+
+	private void stopSilently() {
+		try {
+			if (this.undertow != null) {
+				this.undertow.stop();
+			}
+		}
+		catch (Exception ex) {
+			// Ignore
 		}
 	}
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactoryTests.java

@@ -303,6 +303,9 @@ public class UndertowServletWebServerFactoryTests
 			int blockedPort) {
 		assertThat(ex).isInstanceOf(PortInUseException.class);
 		assertThat(((PortInUseException) ex).getPort()).isEqualTo(blockedPort);
+		Object undertow = ReflectionTestUtils.getField(this.webServer, "undertow");
+		Object worker = ReflectionTestUtils.getField(undertow, "worker");
+		assertThat(worker).isNull();
 	}
 
 }