On Monday 31 December 2007 12:36, Thorsten Pferdekämper wrote:
> Hi,
>
> I just wondered why channel switching needs so long on my box and why it is
> always accompagnied by a "PANIC can't kill program" message in main-0.log.
> Here is what I believe why this is:
>
> Basically, the problem is that os.waitpid and subprocess.Popen.poll do not
> really work together. It seems that only one of them can be used, but not
> both.
>
[...]
Hi,
I have now changed ChildApp.wait() in childapp.py the following way:
Old:
def wait(self):
"""
wait for the child process to stop
returns the (pid, status) tuple
"""
#self.child.wait()
#self.status = self.child.returncode
#return (self.child.pid, self.status)
# this is the wait in ChildApp2
try:
pid, status = os.waitpid(self.child.pid, os.WNOHANG)
except OSError:
# strange, no child? So it is finished
return True
if pid == self.child.pid:
self.status = self.child.returncode
return True
return False
New:
def wait(self):
"""
wait for the child process to stop
returns the (pid, status) tuple
"""
returncode = self.child.poll()
if returncode is None:
return False
else:
self.status = returncode
return True
At least, this works for me and I believe that this should also work for
others.
Regards,
Thorsten
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