Re: plperl crash with Debian 6 (64 bit), pl/perlu, libwww and https

On Thu, 2011-08-04 at 09:42 -0400, Andrew Dunstan wrote:
> 
> On 08/04/2011 09:07 AM, Hannu Krosing wrote:
> > Hi
> >
> > I have been helping some people to debug a SIGALARM related crash
> > induced by using pl/perlu http get functionality
> >
> > I have been so far able to repeat the crash only on Debian 64 bit
> > computers. DB create script and instructions for reproducing the crash
> > attached
> >
> > The crash is related to something leaving begind a bad SIGALARM handler,
> > as it can be (kind of) fixed by resetting sigalarm to nothing using perl
> > function
> 
> So doesn't this look like a bug in the perl module that sets the signal 
> handler and doesn't restore it?
> 
> What happens if you wrap the calls to the module like this?:
> 
>      {
>          local $SIG{ALRM};
>          # do LWP stuff here
>      }
>      return 'OK';
> 
> 
> That should restore the old handler on exit from the block.
> 
> I think if you use a perl module that monkeys with the signal handlers 
> for any signal postgres uses all bets are off.

Sure, but how expensive would it be for pl/perl to do this
automatically ?

> cheers
> 
> andrew
> 
> 
>