YamlProcessor defensively closes InputStream

Issue: SPR-12487

spring-beans/src/main/java/org/springframework/beans/factory/config/YamlProcessor.java

@@ -17,6 +17,7 @@
 package org.springframework.beans.factory.config;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.util.AbstractMap;
 import java.util.Arrays;
 import java.util.Collection;
@@ -146,7 +147,9 @@ public abstract class YamlProcessor {
 			if (this.logger.isDebugEnabled()) {
 				this.logger.debug("Loading from YAML: " + resource);
 			}
-			for (Object object : yaml.loadAll(resource.getInputStream())) {
+			InputStream stream = resource.getInputStream();
+			try {
+				for (Object object : yaml.loadAll(stream)) {
 					if (object != null && process(asMap(object), callback)) {
 						count++;
 						if (this.resolutionMethod == ResolutionMethod.FIRST_FOUND) {
@@ -159,6 +162,10 @@ public abstract class YamlProcessor {
 							" from YAML resource: " + resource);
 				}
 			}
+			finally {
+				stream.close();
+			}
+		}
 		catch (IOException ex) {
 			handleProcessError(resource, ex);
 		}