If Oracle HTTP Server cannot start due to a port conflict, a message containing the string [VirtualHost: main] (98)Address already in use is generated. This error condition occurs if the listen port configured for Oracle HTTP Server is the same as the one in use by another process.
The generated message may look like the following:
[VirtualHost: main] (98)Address already in use: make_sock: could not bind to address [::]:7777
Solution
Determine what process is already using that port, and then either change the IP:port address of Oracle HTTP Server or the port of the conflicting process.
Note:
If the Oracle HTTP Server instance was created with the config Wizard, there is no automated port management. It is possible to create multiple instances using the same Listen port.