Hikari connection pool issue with sybase

I have a java spring boot application which does bulk insert data to sybase using Spring JDBC driver . I am using Sybase JDBC driver and uses DriverManagerDataSource and HikariConnectionPool to do the bulk insert. The Datasource creation goes fine and but when i try to creat the HikariConnectionPool its giving error Connection Closed error. Below is the code .As you see i am doing an explicit call to see if connecton is closed and it returns false. I am not ble to understand what i am missing here. TIA for any suggestions.

SOURCE CODE

@Configuration
@Profile("local")
public class SpringJDBCLocalConfiguration {

    Logger logger = LoggerFactory.getLogger(SpringJDBCLocalConfiguration.class);


    @Bean(name = "dataSource")
    public DataSource dataSource() {


        DriverManagerDataSource dataSource = new DriverManagerDataSource(){{
            setDriverClassName("com.sybase.jdbc4.jdbc.SybDriver");
            setUrl("url");
            setUsername("username");
            setPassword("passwd");         
        }};;

        try {
            Connection conn = dataSource.getConnection();
            logger.info("SpringJDBCLocalConfiguration conn "+conn);
            logger.info("SpringJDBCLocalConfiguration conn isClosed "+conn.isClosed());

        }
        catch(Exception exc){
            logger.error("SpringJDBCLocalConfiguration error getting connection in SpringJDBCLocalConfiguration "+exc);
        }

        HikariConfig config = new HikariConfig() {{
            setDataSource(dataSource);
            setConnectionTestQuery("SELECT 1");
        }};

        HikariDataSource hikariDataSource = new HikariDataSource(config);
        return hikariDataSource;
    }


    @Bean
    public JdbcTemplate jdbcTemplate(@Qualifier("dataSource") DataSource dataSource) {

        JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource());        
        return jdbcTemplate;
    }
}   

ERROR STACK TRACE

[ main] c.j.a.w.e.d.SpringJDBCLocalConfiguration : inside SpringJDBCLocalConfiguration.dataSource method flushStrategy
[ main] com.zaxxer.hikari.HikariConfig : sybase-pool - idleTimeout is close to or more than maxLifetime, disabling it.
[ main] com.zaxxer.hikari.HikariDataSource : sybase-pool - Starting...
[ main] com.zaxxer.hikari.pool.PoolBase : sybase-pool - Driver does not support get/set network timeout for connections. (com.sybase.jdbc4.jdbc.SybConnection.getNetworkTimeout()I)
[ main] com.zaxxer.hikari.pool.HikariPool : sybase-pool - Exception during pool initialization.
 java.sql.SQLException: JZ0C0: Connection is already closed.
 at com.sybase.jdbc4.jdbc.ErrorMessage.raiseError(ErrorMessage.java:779) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.SybConnection.checkConnection(SybConnection.java:4010) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.SybStatement.close(SybStatement.java:744) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.SybStatement.close(SybStatement.java:719) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.MdaManager.loadMetaData(MdaManager.java:573) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.MdaManager.<init>(MdaManager.java:188) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.MdaManager.<init>(MdaManager.java:171) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.SybConnection.checkMDA(SybConnection.java:4155) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.SybConnection.getMDA(SybConnection.java:3685) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.tds.Tds.setOption(Tds.java:1829) ~[jconn4-7.07-27307.jar!/:na]
 at com.sybase.jdbc4.jdbc.SybConnection.setReadOnly(SybConnection.java:2586) ~[jconn4-7.07-27307.jar!/:na]
 at com.zaxxer.hikari.pool.PoolBase.setupConnection(PoolBase.java:409) ~[HikariCP-2.7.9.jar!/:na]
 at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:370) ~[HikariCP-2.7.9.jar!/:na]
 at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:194) ~[HikariCP-2.7.9.jar!/:na]
 at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:460) [HikariCP-2.7.9.jar!/:na]
 at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:534) [HikariCP-2.7.9.jar!/:na]
 at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) [HikariCP-2.7.9.jar!/:na]
 at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81) [HikariCP-2.7.9.jar!/:na]