15.1.3 Steps to take when connection from the application program to the HADB server takes time
If the application program is operating in a Linux environment, queries to the DNS server about the host name and other items might take time. In such cases, it might also take time for the application program to connect to the HADB server.
Make sure that the settings in the /etc/nsswitch.conf file are specified as follows:
hosts: files myhostname dns