diff --git a/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/components/JdbcTaosdemoConfig.java b/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/components/JdbcTaosdemoConfig.java
index 1fb1c507b63b4085a9e2c4e96266148992941e5d..971c10dee2889543e95a70b244ea3cda462df3a6 100644
--- a/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/components/JdbcTaosdemoConfig.java
+++ b/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/components/JdbcTaosdemoConfig.java
@@ -4,7 +4,7 @@ import com.taosdata.taosdemo.utils.TimeStampUtil;
 
 public final class JdbcTaosdemoConfig {
     // instance
-    public String host = "master";          //host
+    public String host;                     //host
     public int port = 6030;                 //port
     public String user = "root";            //user
     public String password = "taosdata";    //password
diff --git a/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/service/SubTableService.java b/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/service/SubTableService.java
index ce7794545307b492da2bf42877da51a2ff5a8374..cea98a1c5d350ed22ed5d26c72fedb212dcb7f26 100644
--- a/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/service/SubTableService.java
+++ b/tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/service/SubTableService.java
@@ -33,6 +33,11 @@ public class SubTableService extends AbstractService {
             executor.execute(() -> createSubTable(superTableMeta, prefixOfTable + (tableIndex + 1)));
         }
         executor.shutdown();
+        try {
+            executor.awaitTermination(Long.MAX_VALUE,TimeUnit.NANOSECONDS);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
     }
 
     public void createSubTable(SuperTableMeta superTableMeta, String tableName) {
diff --git a/tests/examples/JDBC/taosdemo/src/main/resources/application.properties b/tests/examples/JDBC/taosdemo/src/main/resources/application.properties
index aaa80b9f88dbda337214772bcbf668478f512823..cbd25c82665a8fe9be12595570cd11c1b2f82448 100644
--- a/tests/examples/JDBC/taosdemo/src/main/resources/application.properties
+++ b/tests/examples/JDBC/taosdemo/src/main/resources/application.properties
@@ -16,6 +16,6 @@ spring.datasource.password=taosdata
 #logging.level.com.taosdata.taosdemo.dao=error
 
 jdbc.driver=com.taosdata.jdbc.rs.RestfulDriver
-hikari.maximum-pool-size=500
-hikari.minimum-idle=100
+hikari.maximum-pool-size=1
+hikari.minimum-idle=1
 hikari.max-lifetime=0
\ No newline at end of file
diff --git a/tests/examples/JDBC/taosdemo/src/main/resources/lib/taos-jdbcdriver-2.0.15-dist.jar b/tests/examples/JDBC/taosdemo/src/main/resources/lib/taos-jdbcdriver-2.0.15-dist.jar
new file mode 100644
index 0000000000000000000000000000000000000000..58508b92e5afec7e400691d213940536e8abe5f6
Binary files /dev/null and b/tests/examples/JDBC/taosdemo/src/main/resources/lib/taos-jdbcdriver-2.0.15-dist.jar differ