From 51da2f16e53a030933263a1f73838ecc04dfe667 Mon Sep 17 00:00:00 2001
From: "shaojin.wensj" <shaojin.wensj@alibaba-inc.com>
Date: Sun, 10 Apr 2022 14:27:23 +0800
Subject: [PATCH] bug fixed for compatible

---
 .../druid/pool/vendor/MySqlValidConnectionChecker.java        | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
index c403c50a4f..c988727fca 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
@@ -45,6 +45,10 @@ public class MySqlValidConnectionChecker extends ValidConnectionCheckerAdapter i
     private Method   ping;
     private boolean  usePingMethod = false;
 
+    public MySqlValidConnectionChecker() {
+        this(false);
+    }
+
     public MySqlValidConnectionChecker(boolean usePingMethod){
         try {
             clazz = Utils.loadClass("com.mysql.jdbc.MySQLConnection");