CachingMetadataReaderFactory releases shared cache Map on clearCache()

LocalResourceCache properly initializes cacheLimit on construction.

Issue: SPR-17527

(cherry picked from commit 262c702)

Author: jhoeller

spring-core/src/main/java/org/springframework/core/type/classreading/CachingMetadataReaderFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -149,6 +149,10 @@ public void clearCache() {
 				this.metadataReaderCache.clear();
 			}
 		}
+		else if (this.metadataReaderCache != null) {
+			// Shared resource cache -> reset to local cache.
+			setCacheLimit(DEFAULT_CACHE_LIMIT);
+		}
 	}
 
 
@@ -159,6 +163,7 @@ private static class LocalResourceCache extends LinkedHashMap<Resource, Metadata
 
 		public LocalResourceCache(int cacheLimit) {
 			super(cacheLimit, 0.75f, true);
+			this.cacheLimit = cacheLimit;
 		}
 
 		public void setCacheLimit(int cacheLimit) {