The SystemCaller is fairly simple and it doesn't return the process id.

For your use case, I would recommend using the PythonCaller rather than the SystemCaller.

Starting point:

import subprocess
 
def ProcessFeature(feature):
    process = subprocess.Popen(["echo", "hello"])
    print(process.pid)

import subprocess
 
def ProcessFeature(feature):
    process = subprocess.Popen(["echo", "hello"])
    print(process.pid)

Hi @david_r​ ,

     Thank you for the quick response. I will try this one and will get back to you with the updates

Hi @david_r​ ,

I am a fresher in python, so after exploring https://docs.python.org/3/library/subprocess.html#frequently-used-arguments, I could run below code with hard coded arguments like subprocess.Popen(["abc.exe", "arg1","arg2",....]), but its failing when I am running using 'arg' variable where cmd = ["abc.exe", "arg1","arg2",....]. Is there any syntax error?

import subprocess

def processFeature(feature):

  arg = feature.getAttribute('cmd')

  proc = subprocess.Popen(arg)

  feature.setAttribute("process_id",proc.pid)

  try:

    outs, errs = proc.communicate(timeout=120)

  except subprocess.TimeoutExpired:

    proc.kill()

    outs, errs = proc.communicate()

    feature.setAttribute("IsFailed","T")

Thanks in advance

Just make sure 'arg' is a list, not a string. The function feature.getAttribute() does not return a list, unless you're referencing an FME list attribute.

Thanks @david_r​  list method worked😊