On 2007/03/14 at 16:30:31 Florian Weimer <[EMAIL PROTECTED]> wrote
> * Michal Sabala:
>
> > The perl program in question is a single thread process using Net::Pcap
> > to capture and analyze network traffic. Every few weeks the program
> > hangs in pthread_setcanceltype().
>
> > I'm investigating is forcing LinuxThreads instead of NPTL will bypass
> > the issue. Also, I've had a RHEL4 machine hang in futex.
>
> Does your program call setuid or something like that? Does it fork?
Hello Florian,
The program sets $EGID and $EUID right after it starts to drop from root
to non-privileged user.
During operation, it forks and execs a child process (every few minutes).
$SIG{CHLD} is:
sub handlerCHLD {
my $child = 0;
my $waitAttempts = 3;
while ( ($child = waitpid( -1, WNOHANG)) > 0 && $waitAttempts > 0 ){
print "Waited for child process PID=$child\n";
$waitAttempts--;
}
$SIG{CHLD} = \&handlerCHLD; #
}
before launching the next child process, parent process does:
if ( defined $oldChild && waitpid( $oldChild, WNOHANG ) == 0 ){
print "Child process pid=$oldChild is still running!! killing it!!!\n";
kill 9, $oldChild;
}
Kill is never called with the child process I'm using (as it completes
quickly).
Thanks in-advance for all suggestions and input.
Michal
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