Hello Monks. I have spent days and days searching this site and everywhere trying to resolve this issue. I have a script that uses Parallel::ForkManager to fork off 3 concurrent processes. It loops through an array of 5 and the behavior I am looking for is to have three running all the time. The problem is if one of them hangs or is in a loop, the processing stops as wait_all_children is never satisfied. What I am looking for is to have the looping process do its thing (and I would add code to notify this is happening and, potentially, to automatically kill it) while allowing the other two available forks to continue processing. So, wait_all_children doesn't cut it. In my test script, below, I am forking 5 different scripts. Scripts test[1235].sh just echo "I am running testx.sh" while test4.sh echoes the same in an endless loop with a sleep 10 in it. It all stops and leaves just test4.sh running indefinitely and, since wait_all_children isn't satisfied, the others are never forked off again. 
use strict;
use warnings;
use Parallel::ForkManager;

my @runArray = ("test1.sh", "test2.sh", "test3.sh", "test4.sh", "test5
+.sh");
my ($pid, $exitCode, $ident);

my $forkMgr = Parallel::ForkManager->new(3);

$forkMgr->run_on_start(
    sub {
        ($pid, $ident) = @_;
        print "Started ==> $ident\n";
    }
);

$forkMgr->run_on_finish(
    sub {
        ($pid, $exitCode, $ident) = @_;
        print "Ended ==> $ident\n";
    }
);

while (1) {
    for my $runCommand (@runArray) {
        $forkMgr->start($runCommand) and next;
        system("/usr/localcw/opt/patrol/nagios/libexec/$runCommand");
        $forkMgr->finish;
    }

    $forkMgr->wait_all_children;

    sleep 10;
}

exit;

[download]
Even commenting out wait_all_children doesn't help. This is a sample from a critical application I am working on and I am at wit's end. Thanks for your consideration, Rick

In reply to Parallel::ForkManager and wait_all_children by rgren925

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