The network layer was unable to determine the IP address of "localhost". Check the following: 1) The Domain Name Server (DNS), or its equivalent, is available. If the DNS is not available, try explicitly specifying the localhost IP number (usually 127.0.0.1) instead. 2) The HOSTS file contains an entry that maps the "localhost" name to an IP number. 3) There are enough system resources available. Free up system resources if they are running low.