A
Ajay Bakhshi
Hi,
I am facing the following problem on HP.
Background:
I have a GUI (QT package) and I am running tasks in Threads. These threads
spawn a process and read the output of the process and then display the O/P
on the GUI.
Now I can get a new process spawned by using a menu option.
Now every alternate time the process hangs (spawned from the same gui):
I.e. First process hangs.
Second goes through fine.
Third goes fine
Fourth hangs.
More on the problem:
This is what happens, when I call
os.fork()
In the parent process I get the Pid of the child and the parent is fine.
But in the child process (even before calling exec) my print statements work
but anything os.XXX function call fails. I did a very simple stuff: before
calling exec:
Os.system("touch /tmp/m1") and this system call fails (for situations where
the process hangs).
NOTE: The hp system is:
HP-UX 11.11
It has MSCS cluster installed on it.
Python: 2.2.3
Has any body seen such a hanging of processes.
Thanks
-Ajay B
I am facing the following problem on HP.
Background:
I have a GUI (QT package) and I am running tasks in Threads. These threads
spawn a process and read the output of the process and then display the O/P
on the GUI.
Now I can get a new process spawned by using a menu option.
Now every alternate time the process hangs (spawned from the same gui):
I.e. First process hangs.
Second goes through fine.
Third goes fine
Fourth hangs.
More on the problem:
This is what happens, when I call
os.fork()
In the parent process I get the Pid of the child and the parent is fine.
But in the child process (even before calling exec) my print statements work
but anything os.XXX function call fails. I did a very simple stuff: before
calling exec:
Os.system("touch /tmp/m1") and this system call fails (for situations where
the process hangs).
NOTE: The hp system is:
HP-UX 11.11
It has MSCS cluster installed on it.
Python: 2.2.3
Has any body seen such a hanging of processes.
Thanks
-Ajay B