diff --git a/src/main/java/com/alibaba/druid/pool/PoolableConnection.java b/src/main/java/com/alibaba/druid/pool/PoolableConnection.java
index 71d59fb9aa..aa59cc6e2c 100644
--- a/src/main/java/com/alibaba/druid/pool/PoolableConnection.java
+++ b/src/main/java/com/alibaba/druid/pool/PoolableConnection.java
@@ -127,7 +127,7 @@ public class PoolableConnection implements PooledConnection, Connection {
             
             stmt.setClosed(true); // soft set close
             
-            if (stmt.getHitCount() < 2 && isOracle()) {
+            if (stmt.getHitCount() < 1 && isOracle()) {
                 OracleUtils.clearDefines(stmt);
             }
         } else {
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 f9d4b4485b..d18fd2408c 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
@@ -1,39 +1,21 @@
 package com.alibaba.druid.pool.vendor;
 
 import java.io.Serializable;
-import java.lang.reflect.Method;
 import java.sql.Connection;
-import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Statement;
 
 import com.alibaba.druid.logging.Log;
 import com.alibaba.druid.logging.LogFactory;
-import com.alibaba.druid.pool.PoolableConnection;
 import com.alibaba.druid.pool.ValidConnectionChecker;
-import com.alibaba.druid.proxy.jdbc.ConnectionProxy;
-import com.alibaba.druid.util.DruidLoaderUtils;
-import com.alibaba.druid.util.JdbcUtils;
+import com.alibaba.druid.util.MySqlUtils;
 
 public class MySqlValidConnectionChecker implements ValidConnectionChecker, Serializable {
 
-    private static final long serialVersionUID    = 1L;
-    private static final Log  LOG                 = LogFactory.getLog(MySqlValidConnectionChecker.class);
-
-    private Class<?>          clazz;
-    private Method            ping;
-    private boolean           driverHasPingMethod = false;
+    private static final long serialVersionUID = 1L;
+    private static final Log  LOG              = LogFactory.getLog(MySqlValidConnectionChecker.class);
 
     public MySqlValidConnectionChecker(){
-        try {
-            clazz = DruidLoaderUtils.loadClass("com.mysql.jdbc.Connection");
-            ping = clazz.getMethod("ping");
-            if (ping != null) {
-                driverHasPingMethod = true;
-            }
-        } catch (Exception e) {
-            LOG.warn("Cannot resolve com.mysq.jdbc.Connection.ping method.  Will use 'SELECT 1' instead.", e);
-        }
+
     }
 
     public boolean isValidConnection(Connection conn, String valiateQuery, int validationQueryTimeout) {
@@ -50,41 +32,12 @@ public class MySqlValidConnectionChecker implements ValidConnectionChecker, Seri
             return true;
         }
 
-        if (driverHasPingMethod) {
-            if (conn instanceof PoolableConnection) {
-                conn = ((PoolableConnection) conn).getConnection();
-            }
-
-            if (conn instanceof ConnectionProxy) {
-                conn = ((ConnectionProxy) conn).getConnectionRaw();
-            }
-
-            if (clazz.isAssignableFrom(conn.getClass())) {
-                try {
-                    ping.invoke(conn);
-                    return true;
-                } catch (Exception e) {
-                    LOG.warn("Unexpected error in ping", e);
-                    return false;
-                }
-            }
-        }
-
-        Statement stmt = null;
-        ResultSet rs = null;
         try {
-            stmt = conn.createStatement();
-            stmt.setQueryTimeout(validationQueryTimeout);
-            rs = stmt.executeQuery(valiateQuery);
+            MySqlUtils.ping(conn);
             return true;
-        } catch (SQLException e) {
-            return false;
         } catch (Exception e) {
             LOG.warn("Unexpected error in ping", e);
             return false;
-        } finally {
-            JdbcUtils.close(rs);
-            JdbcUtils.close(stmt);
         }
 
     }
diff --git a/src/main/java/com/alibaba/druid/util/MySqlUtils.java b/src/main/java/com/alibaba/druid/util/MySqlUtils.java
new file mode 100644
index 0000000000..a442813dab
--- /dev/null
+++ b/src/main/java/com/alibaba/druid/util/MySqlUtils.java
@@ -0,0 +1,20 @@
+package com.alibaba.druid.util;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+
+public class MySqlUtils {
+    public static com.mysql.jdbc.Connection unwrap(Connection conn) throws SQLException {
+        if (conn instanceof com.mysql.jdbc.Connection) {
+            return (com.mysql.jdbc.Connection) conn;
+        }
+
+        return conn.unwrap(com.mysql.jdbc.Connection.class);
+    }
+    
+    public static void ping(Connection conn) throws SQLException {
+        com.mysql.jdbc.Connection mysqlConn = unwrap(conn);
+        mysqlConn.ping();
+    }
+}