Initialization and Recovery
555-233-143
3-4 Issue 1 May 2002
When the entire system is shut down via the stop command, the Watchdog
executes the Linux “shutdown -r 0” command, which is the normal way to
reboot Linux.
When Watchd terminates an individual process, it sends a SIGTERM signal.
Shutting down a single application involves sending a SIGTERM signal to the
application’s “leader” process. The application receiving the SIGTERM signal is
responsible to shut itself down cleanly.
For MultiVantage, the Process Manager sends a SIGTERM signal to its own
“pamshut” thread. The thread checks whether any critical SAT commands (like
“save translations”) are active. If so, the thread waits a few seconds and checks
again. If not (either initially or after a few seconds), then the pamshut thread
requests a shutdown (actually a reboot) from the Process Manager.
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