in reply to Re^4: Parallel ForkManager problem: parent dies early before all the child finishes
in thread Parallel ForkManager problem: parent dies early before all the child finishes

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;
}

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