I am trying connecting MSSQL via JDBC with Kerberos authentication and I was success when I configured in the following way as through jvm arguments.

-Djava.security.krb5.conf=$SECURITY_KRB5_CONF -Djava.security.auth.login.config=$SECURITY_JAAS_CONF

As I am getting keytab file on the fly I can not use JAAS congf as JVM parameter and instead passing parameters in the following way at the place where I am trying to get JDBC connection but it is not considering the Principal which passed over instead it trying to authenticate with system logged in user@Realm.

if (authType.contains(AuthenticationType.KERBEROS.getAuthType())) {
           
            String spn = userNAME
            String keytabFile = ***             
            System.setProperty("java.security.krb5.conf", krb5ConfLocation);
            System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
            System.setProperty("java.security.auth.login.module.spi", "com.sun.security.auth.module.Krb5LoginModule");
            System.setProperty("principal", spn);
            System.setProperty("javax.security.auth.login.config",keytabFile);
            //System.setProperty("sun.security.krb5.debug", krb5Debug);

        }

       return  connection = DriverManager.getConnection(jdbcURL,jdbcProps);
   }

Any help would be greatly appreciated here.