From 16cd888dd9fa4dc2da642a8edb45e708e296a086 Mon Sep 17 00:00:00 2001 From: Florent Xicluna Date: Sun, 7 Mar 2010 23:49:03 +0000 Subject: [PATCH] Backport the Popen.poll() protection from subprocess to multiprocessing. See #1731717. It should fix transient failures on test_multiprocessing. --- Lib/multiprocessing/forking.py | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/Lib/multiprocessing/forking.py b/Lib/multiprocessing/forking.py index 7eda99180a..a66f7a0889 100644 --- a/Lib/multiprocessing/forking.py +++ b/Lib/multiprocessing/forking.py @@ -103,7 +103,12 @@ if sys.platform != 'win32': def poll(self, flag=os.WNOHANG): if self.returncode is None: - pid, sts = os.waitpid(self.pid, flag) + try: + pid, sts = os.waitpid(self.pid, flag) + except os.error: + # Child process not yet created. See #1731717 + # e.errno == errno.ECHILD == 10 + return None if pid == self.pid: if os.WIFSIGNALED(sts): self.returncode = -os.WTERMSIG(sts) -- 2.40.0