[issue31935] subprocess.run() timeout not working with grandchildren and stdout=PIPE

Martin Panter added the comment: Closing in faviour of Issue 30154, which suggests documentation or adjusting the timeout implementation. There is also Issue 26534 proposing a new “kill_group” option when using the timeout feature. -- resolution: -> duplicate stage: -> resolved

[issue31935] subprocess.run() timeout not working with grandchildren and stdout=PIPE

Change by STINNER Victor : -- nosy: +haypo ___ Python tracker ___ ___

[issue31935] subprocess.run() timeout not working with grandchildren and stdout=PIPE

Martin Panter added the comment: This proposal sounds like a race condition. Closing the output pipe as a child exits means you risk missing recent output. On the other hand, if you don’t care about the output any more, close the pipe first and then wait for the child.

[issue31935] subprocess.run() timeout not working with grandchildren and stdout=PIPE

New submission from Martin Ritter : Hi, I tried to use subprocess.run(..., stdout=subprocess.PIPE, timeout=N) to run some test scripts with a given timeout. This works as expected with simple scripts. However if the script itself creates other children which