Log missing web application context at warn level (instead of debug)

Closes gh-26925

Author: jhoeller

spring-web/src/main/java/org/springframework/web/context/support/SpringBeanAutowiringSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -85,10 +85,11 @@ public static void processInjectionBasedOnCurrentContext(Object target) {
 			bpp.processInjection(target);
 		}
 		else {
-			if (logger.isDebugEnabled()) {
-				logger.debug("Current WebApplicationContext is not available for processing of " +
+			if (logger.isWarnEnabled()) {
+				logger.warn("Current WebApplicationContext is not available for processing of " +
 						ClassUtils.getShortName(target.getClass()) + ": " +
-						"Make sure this class gets constructed in a Spring web application. Proceeding without injection.");
+						"Make sure this class gets constructed in a Spring web application after the" +
+						"Spring WebApplicationContext has been initialized. Proceeding without injection.");
 			}
 		}
 	}