change

src/connector/jdbc/pom.xml

@@ -36,6 +36,7 @@
         <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <commons-logging.version>1.1.2</commons-logging.version>
         <commons-lang3.version>3.5</commons-lang3.version>
+        <maven.test.jvmargs></maven.test.jvmargs>
     </properties>
     <dependencies>
         <dependency>
@@ -122,6 +123,8 @@
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>2.12.4</version>
                 <configuration>
+                    <forkMode>pretest</forkMode>
+                    <argLine>${maven.test.jvmargs}</argLine>
                     <includes>
                         <include>**/*Test.java</include>
                     </includes>

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/TaosInfoMonitorTest.java

@@ -13,9 +13,8 @@ import java.util.stream.IntStream;
 public class TaosInfoMonitorTest {
 
     @Test
-    public void testCreateTooManyConnection() throws ClassNotFoundException, SQLException, InterruptedException {
+    public void testCreateTooManyConnection() throws ClassNotFoundException {
         Class.forName("com.taosdata.jdbc.TSDBDriver");
-        int conCnt = 0;
         final String url = "jdbc:TAOS://127.0.0.1:6030/?user=root&password=taosdata";
 
         List<Connection> connectionList = IntStream.range(0, 100).mapToObj(i -> {
@@ -27,6 +26,7 @@ public class TaosInfoMonitorTest {
             }
             return null;
         }).collect(Collectors.toList());
+
         connectionList.stream().forEach(conn -> {
             try {
                 conn.close();