Hi,
I am pretty new to python, so be gentle :)
I have a python script that spawns a number of threads (configurable) on a
12 processor AIX RISC-6000 machine. It works fine, so long as I am running
less than 5 threads. With more than 5, I get errors, but only on AIX, not
on Linux.
The python script is fairly simple, because each thread just spawns a korn
shell script. I actually get the error in the shell script, not in python,
but I think it may be python related, because I don't get the error when I
run the whole thing as a korn shell script.
Basically, each thread does:
pipe0_ = os.popen( 't.ksh 2>&1', 'r')
text0_ = pipe0_.read()
sts0_ = pipe0_.close()`
to spawn a shell script (t.ksh) that does:
cd subdir
ls -l
exit $?
There is a different subdir for each thread.
This works fine, so long as I am running less than 5 threads. But once I
run more than that, I start getting an error from the script:
sh: /home/gpomper/tmp/t8/thread.ksh: 0403-015 Cannot access a required
executable file. It is in use.
This problem only occurs on AIX. It runs fine on my Red Hat 9.0 machine.
I have tried to find what that AIX error means, with no luck. My problem
is made more difficult, because I try to simulate the error by writing a
korn shell script that basically does this:
t.ksh &
t.ksh &
t.ksh &
....
t.ksh &
repeated 20 times, and modify t.ksh so that it loops 100 time, so that I
can guarantee that all the processes are running simultaneously. When I
try this, I don't get the error.
Unfortunately, this makes AIX tech support think that this is a python
issue, not an AIX issue.
I would be *extremely* grateful for helpful suggestions.
- Gardner
