update

examcloud-core-oe-task-service/src/main/java/cn/com/qmth/examcloud/core/oe/task/service/bean/FaceApiParam.java

@@ -32,7 +32,8 @@ public class FaceApiParam implements Serializable {
     private boolean useLocalBaiduApiForFaceLiveness = true;
 
     public int getMaxThreadNum() {
-        return maxThreadNum;
+        // 最大数不超过20
+        return Math.min(maxThreadNum, 20);
     }
 
     public void setMaxThreadNum(int maxThreadNum) {