Monit considers processes to be monitored even though it is kinda aware it is dead

[Former user]

We use with pidfile syntax to check is the process dead, and restart it if needed. This problem happens rarely, so it could be some sort of a concurrency problem.

However, we noticed that even though the actual process is dead; the monit still considers its status to be 'monitored', though it can't get any other info about it.

Example output

The Monit daemon 5.17.1 uptime: 3d 6h 6m 

Process 'process-0'
  status                            Running
  monitoring status                 Monitored
  pid                               3170
  parent pid                        1
  uid                               500
  effective uid                     500
  gid                               500
  uptime                            54m 
  threads                           22
  children                          0
  memory                            11.0 MB
  memory total                      11.0 MB
  memory percent                    0.0%
  memory percent total              0.0%
  cpu percent                       0.0%
  cpu percent total                 0.0%
  data collected                    Mon, 18 Apr 2016 20:09:50

Process 'process-31'
  status                            Running
  monitoring status                 Monitored
  pid                               -
  parent pid                        -
  uid                               -
  effective uid                     -
  gid                               -
  uptime                            -
  threads                           -
  children                          -
  memory                            -
  memory total                      -
  memory percent                    -
  memory percent total              -
  cpu percent                       -
  cpu percent total                 -
  data collected                    Mon, 18 Apr 2016 20:09:50

[Bariša Obradović]

The process configuration is a simple one

check process #{process_name}
  with pidfile #{pidfile}
  start program = 'start_script' with timeout 10 seconds
  stop program = 'stop_script && rm #{pidfile}'
  group my_group

[Tildeslash]

please can you send monit log to [e-mail]?

[Bariša Obradović]

Sorry, I didn't save the monit logs from the time of the issue. When it happens again, I download them and pass them along.

[Tildeslash]

waiting for data (logs)

[Tildeslash]

Duplicate of #367.