.....

src/main/java/cn/com/qmth/examcloud/web/cache/RandomCacheBean.java

@@ -16,7 +16,7 @@ public abstract class RandomCacheBean implements Serializable {
 	/**
 	 * 缓存是否有值(防缓存穿透)
 	 */
-	private Boolean hasValue;
+	private Boolean hasValue = true;
 
 	public Boolean getHasValue() {
 		return hasValue;