SPECTRUM Process Stop alarms unexpected after configuration of Process Monitor

Products

• Spectrum

Issue/Introduction

SPECTRUM Process Stop alarms unexpected after configuration of Process Monitor

After configuring the following process monitor, an alarm was asserted when a process stopped. The expectation was the alarm would only be asserted if there were less than 1 and more than 100 of the processes running:

Process Name - mongrel_rails
Parameters - None
Descriptive Name - mongrel process
No. Running - 40
Alarm on Stop - true
Alarm on Start - false
Alarm if Count < - 1
Alarm if Count > 100
Rule Owner - CRG_PROD_CIA_APP

Environment

Release: 20.2.x
Component: SPCAPP - Process Monitoring

Cause

The "Alarm on Stop" is set to True

Resolution

Set "Alarm on Stop" to False.

Additional Information

Reference the "Process Monitoring" section of the documentation for ore information.

In some situations, processes may spawn child processes that run for a short period of time and then exit. In cases like this the
  'Process Stop' option being enabled (checked) can alarm on the exit of the child process while the main process continues to
  alarm. It is suggested to uncheck the 'Process Stop' option and set the 'Process Count less than' option to 1 so that an alarm
  is raised if there are no instances running.