Process monitoring w/ Haskell angel

Question

I'm attempting to monitor a process w/ haskell's angel process monitoring tool. https://github.com/MichaelXavier/Angel The process continues to restart in an infinte loop when it is run w/o receiving any kind of HUP signal.

See below...

[2013/12/18 22:25:15] {- program: ls -} RESTART
[2013/12/18 22:25:15] {- program: ls -} START
[2013/12/18 22:25:15] {- program: ls -} Spawning process with env Just []
[2013/12/18 22:25:15] {- program: ls -} RUNNING
[2013/12/18 22:25:15] {- program: ls -} ENDED
[2013/12/18 22:25:15] {- program: ls -} WAITING
[2013/12/18 22:25:22] {- program: ls -} RESTART
[2013/12/18 22:25:22] {- program: ls -} START
[2013/12/18 22:25:22] {- program: ls -} Spawning process with env Just []
[2013/12/18 22:25:22] {- program: ls -} RUNNING
[2013/12/18 22:25:22] {- program: ls -} ENDED
[2013/12/18 22:25:22] {- program: ls -} WAITING
[2013/12/18 22:25:29] {- program: ls -} RESTART
[2013/12/18 22:25:29] {- program: ls -} START
[2013/12/18 22:25:29] {- program: ls -} Spawning process with env Just []
 ... etc

It does this for the example app as well as when I try to run my web server. Here is my conf file (straight from the examples)

ls {
    exec = "ls"
    stdout = "/tmp/ls_log"
    stderr = "/tmp/ls_log"
    delay = 7
}

I have given angel +x privileges.

Any ideas on why it keeps restarting infinitely?

Answer 1

This is by design. Once ls finishes, angel will wait 7 seconds and restart it. Once again, ls will finish immediately and angel will wait 7 seconds before repeating...

Answer 2

Can you try with

ls_lala { exec = "ls" stdout = "/tmp/ls_log" stderr = "/tmp/ls_log" delay = 7 }

You may go into infinite loop because you struct name is the same of the app to be executed.