diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBResultSet.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBResultSet.java
index 84a3f58f4692a99737af7d93c5578fc7a5a09c27..a8a8b3ca876cf1d2cbc9363b49f0f49da7550b90 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBResultSet.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBResultSet.java
@@ -39,7 +39,6 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
-@SuppressWarnings("unused")
 public class TSDBResultSet implements ResultSet {
 	private TSDBJNIConnector jniConnector = null;
 
@@ -104,6 +103,7 @@ public class TSDBResultSet implements ResultSet {
 	}
 
 	public TSDBResultSet() {
+		
 	}
 
 	public TSDBResultSet(TSDBJNIConnector connector, long resultSetPointer) throws SQLException {
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBStatement.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBStatement.java
index 56e6d73a014a84280691a6a0c016cb5d3e712696..381f1d3622a393cd47361c6e367e310d29fc5d72 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBStatement.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBStatement.java
@@ -68,12 +68,6 @@ public class TSDBStatement implements Statement {
         // TODO make sure it is not a update query
         pSql = this.connector.executeQuery(sql);
 
-        try {
-            TimeUnit.SECONDS.sleep(10);
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
-
         long resultSetPointer = this.connector.getResultSet();
         if (resultSetPointer == TSDBConstants.JNI_CONNECTION_NULL) {
             this.connector.freeResultSet(pSql);
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/MultiThreadsWithSameStatmentTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/MultiThreadsWithSameStatmentTest.java
index 3dc2f9680c774d94934f87a197e8de6d1b12018d..5cb76cc0cb71e1cb879b696d05cc6682f93d0bdc 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/MultiThreadsWithSameStatmentTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/MultiThreadsWithSameStatmentTest.java
@@ -1,13 +1,11 @@
 package com.taosdata.jdbc.cases;
 
 import org.junit.After;
-import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.Test;
 
 import java.sql.*;
 import java.util.concurrent.TimeUnit;
-import java.util.stream.IntStream;
 
 public class MultiThreadsWithSameStatmentTest {
 
@@ -28,7 +26,7 @@ public class MultiThreadsWithSameStatmentTest {
             }
         }
 
-        public void release(){
+        public void release() {
             try {
                 stmt.close();
                 conn.close();
@@ -63,13 +61,16 @@ public class MultiThreadsWithSameStatmentTest {
         });
 
         Thread t2 = new Thread(() -> {
-            try {
-                Service service = new Service();
-                service.stmt.executeUpdate("insert into jdbctest.weather values(now,1)");
-                service.release();
-            } catch (SQLException e) {
-                e.printStackTrace();
+            while (true) {
+                try {
+                    Service service = new Service();
+                    service.stmt.executeUpdate("insert into jdbctest.weather values(now,1)");
+                    service.release();
+                } catch (SQLException e) {
+                    e.printStackTrace();
+                }
             }
+
         });
         t1.start();
         sleep(1000);