Communicator e3000 MPE/iX Release 6.0 Express 1 (C.60.01) (30216-90286)

Chapter 3 37
Technical Articles
HP Driver for JDBC
The next set of lines are the LOGGING levels used to determine the type of information to be
logged to the server log file. The meanings of the various logging levels are discussed in the
Troubleshooting Section, under “Server Logging” of the HP Driver for JDBC User’s
Manual.
The server configuration file is read in each time a new server process is started. Thus once
the file is edited and saved, the changes will take place beginning with the next server
process.
If logging is turned on in this file, it will be in effect for all subsequent server processes.
Starting and Stopping HP JDBC Monitor
HP JDBC Monitor is the server-side counterpart of HP Driver for JDBC, present on the
client-side. For a JDBC application to connect to a database, the JDBC Monitor must be
running on the database server. JDBC Monitor can be started manually or automatically
at system startup by including the JDBC Monitor start commands in the system startup
scripts.
HP-UX Monitor Startup and Shutdown The startup and shutdown of the HP-UX
JDBC Monitor is normally controlled by the system startup and shutdown scripts. Thus as
long as the machine is up and running, the JDBC Monitor will also be up.
The only time the Monitor should ever be brought down is to install a newer version. In
this case, use the monctrl command to kill the Monitor process. Do not use the UNIX kill
command, as this could render the server unable to start a new Monitor process. The
monctrl command to shut down the monitor is:
monctrl kill [
portnumber ]
The
portnumber parameter is necessary only if the monitor you wish to shut down is not
running on the default port number 31700.
To restart the monitor after it has been accidentally terminated or was shut down, use the
monctrl command to start it up:
monctrl start [
portnumber ]
Again, the
portnumber parameter is necessary only if you wish to start the monitor on a
port number other than the default port number 31700.
You cannot start a monitor on the same port number as a currently running monitor. You
also can not restart a monitor on its original port number until all child processes that
were spawned by the previous monitor process are terminated, and the port released. If
the monitor is intentionally terminated or accidentally terminates, all of its child processes
must be terminated before it can be restarted. For this reason, the monitor must not be
terminated by using the UNIX kill command. Always use the monctrl tool to kill the
monitor. The tool will search out all the child processes and kill them first, before killing
the monitor.
MPE/iX Monitor Startup and Shutdown The startup and shutdown of the MPE/iX
HP JDBC Monitor is normally done by the startup and shutdown stream jobs, JSTRTMON
and JSTOPMON, which are normally included in MPE/iX system startup and shutdown
scripts. Thus as long as the machine is up and running, the JDBC Monitor will also be up.