Why there is oracle/jdbc/driver/OracleResultSetImpl.isClosed()Z error when running JDBC Service Virt

Hi Team,
I'm getting this below error when trying to use the JDBC service V connection:
Caused by: java.sql.SQLException: Exception: java.lang.AbstractMethodError: Method oracle/jdbc/driver/OracleResultSetImpl.isClosed()Z is abstract

at com.smartbear.servicev.jdbc.driver.RemoteJdbcVirtConnection.invokeRemoteMethod(RemoteJdbcVirtConnection.java:502)

my environment:
JDBC Driver is ready-api-jdbc-virts-2.7.0
JDK version is Java 1.6

Route to Oracle version is 11g 10.2.0.4.0