The named initscript did not check if the PID written in named PID-file is really a PID of a running named server.
After an unclean server shutdown there was a chance, that the PID written in the PID-file was a PID of an existing process, while the named server was not running. As a consequence the initscript identified the server as running and user was therefore unable to start the server.
The initscript was enhanced to perform check if the PID written in PID-file was a PID of running named server. If not, it deletes the PID-file. The check is done before starting/stopping/reloading the server or checking its status.
Now, if the PID written in the PID-file is a PID of an existing process, after an unclean server shutdown and the named server is not running, the initscript identified the server as not running. User is therefore able to start the server without problems.