Re^4: Parallel ForkManager problem: parent dies early before all the child finishes

I was running the normal(serial) version of the program and it runs for 1 hour or so without any problem. I was trying to use parallel version to make the whole thing faster, but for some reason, parent process cant live for even 3/4 minutes.

Comment on Re^4: Parallel ForkManager problem: parent dies early before all the child finishes

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Re^5: Parallel ForkManager problem: parent dies early before all the child finishes by zentara (Cardinal) on Aug 19, 2011 at 17:56 UTC
This is in accordance with ikegami's advice: Do you have signal handlers in the parent? I'm just guessing here, but read O'Reilly forking child processes in cgi It may be that you are not handling the SIG{'CHILD'} for the parallel processes correctly. It recommends `$SIG{'CHLD'} = "wait_for_child_to_die"; sub wait_for_child_to_die{ wait; }` [download] I'm not really a human, but I play one on earth. Old Perl Programmer Haiku ................... flash japh	[reply] [d/l]

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Re^5: Parallel ForkManager problem: parent dies early before all the child finishes
by zentara (Cardinal) on Aug 19, 2011 at 17:56 UTC

ikegami

I'm just guessing here, but read O'Reilly forking child processes in cgi

It may be that you are not handling the SIG{'CHILD'} for the parallel processes correctly. It recommends

$SIG{'CHLD'} = "wait_for_child_to_die";

sub wait_for_child_to_die{
    wait;
}
[download]

I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

[reply]
[d/l]