This may happen if there had been users connected to or the UWCC interface. In these cases the operating system waits a specified period of time before timing those connections out and releasing the port. By default HP and AIX time the connections out with 15 seconds. But the default time for Solaris is around 11 minutes. The operating system's tcp timeout parameters can be adjusted. AIX uses the "no" command to adjust the tcp_timewait parameter. HP/Solaris use the "ndd" command to adjust the tcp_* parameters. Please refer to the man pages for command usage.
To make the change permanent (in the case of reboots/restarts) add the 2 lines to the bottom of the /etc/default/inetinit file and reboot.
/usr/sbin/ndd -set /dev/tcp tcp_fin_wait_2_flush_interval 1500
/usr/sbin/ndd -set /dev/tcp tcp_close_wait_interval 1500
* The values for the Solaris parameter is expressed in milliseconds. This is not the case for all platforms. Please refer to your operating system vendor's documentation.
Configuration files for operating systems:
AIX - /etc/rc.net
Solaris - /etc/default/inetinit
Tru64 UNIX - Use the sysconfigdb or dxkerneltuner command HP-UX - /etc/rc.config.d/nddconf