Using python multiprocessing lib and logger from robot.api corrupts output.xml' file.

[kasadik]

Robot versions: 7.0.1 Python 3.11 Amazon Linux image used

I have tests where I'm using python multiprocessing library. When I'm running them on AWS linux machine I'm getting an error "output.xml' failed: Incompatible child element 'arg' for 'test'". But when I'm running them locally in my MacOS environment everything is ok. This issue occurs upon using logger from robot framework api lib. When two different process are trying to log some data, output.xml file gets corrupted. When logger is removed from functions that are used multiprocessing library everything is working: Example:

from multiprocessing import Process
from robot.api import logger  # to import robot logger lib

def some_func(arg1):
      logger.info('Some arg {arg1})

processes = []

for i in range(2):
    p = Process(target=some_func, args=(i))
    processes.append(p)

for p in processes:
    p.start()

for p in processes:
    p.join()

Amazon Linux image was used Received error after test execution: 'output.xml' failed: Incompatible child element 'arg' for 'test'.

[oboehmer]

@kasadik , did you check the note in https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#communication-when-using-threads ? I fear this is expected..

[kasadik]

@kasadik , did you check the note in https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#communication-when-using-threads ? I fear this is expected..

But why it doesn't happen on MacOS? I'm using the same framework and on MacOS everything is ok, no corruption and report.html is also generated. But somehow on Amazon Linux instance it gets corrupted. Also thx for providing me this link I will take a look.