Python 2.3.3 signals, threads & extensions: signal handling problem

[Holger Joukl]

Hi,
migrating from good old python 1.5.2 to python 2.3, I have a problem
running a program that features some threads which execute calls to
an extension module.
Problem is that all of a sudden, I cannot stop the program with a keyboard
interrupt any more; the installed signal handler does not seem to receive
the signal at all.
This happens both if I rebuild this extension using python 2.3
headers/library
and if I simply use the old extension (ignoring the API version warnings


Any hints?
Btw this is a sun sparc solaris 6 box, python 2.3.3.

G
Holger

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[fishboy]

Hi,
migrating from good old python 1.5.2 to python 2.3, I have a problem
running a program that features some threads which execute calls to
an extension module.
Problem is that all of a sudden, I cannot stop the program with a keyboard
interrupt any more; the installed signal handler does not seem to receive
the signal at all.
This happens both if I rebuild this extension using python 2.3
headers/library
and if I simply use the old extension (ignoring the API version warnings


Any hints?
Btw this is a sun sparc solaris 6 box, python 2.3.3.

G
Holger

http://groups.google.com/groups?hl=...threads+signals&meta=group=comp.lang.python.*

Looking at this search leads me to believe:

1. Threads + signals = bad

2. at some point things were changed to send all signals to the main
thread. (python)

Which leads me to believe that your signal handler is in a sub-thread?

hth,

 

[Dieter Maurer]

migrating from good old python 1.5.2 to python 2.3, I have a problem
running a program that features some threads which execute calls to
an extension module.
Problem is that all of a sudden, I cannot stop the program with a keyboard
interrupt any more; the installed signal handler does not seem to receive
the signal at all.

python-Bugs-756924 may be related to your problem.

If so, you have a chance that the problem is fixed in Python 2.4.