Merge branch '1.5.x'

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyWebServer.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -159,9 +159,11 @@ public class JettyWebServer implements WebServer {
 								+ " with context path '" + getContextPath() + "'");
 			}
 			catch (WebServerException ex) {
+				stopSilently();
 				throw ex;
 			}
 			catch (Exception ex) {
+				stopSilently();
 				throw new WebServerException("Unable to start embedded Jetty server", ex);
 			}
 		}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatWebServer.java

@@ -122,6 +122,7 @@ public class TomcatWebServer implements WebServer {
 				startDaemonAwaitThread();
 			}
 			catch (Exception ex) {
+				stopSilently();
 				throw new WebServerException("Unable to start embedded Tomcat", ex);
 			}
 		}