http://www.perlmonks.org?node_id=1036141


in reply to Parallel::ForkManager leaves a zombie process from last child

anyway, this seems to work better 
while (1)
{

    $pm->start and next; 
    while ($inputcon = $daemon->accept()) {
        do_client_stuff($inputcon);
    }

    $pm->finish();
}

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it reuses processes and I don't see zombies.

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Re^2: Parallel::ForkManager leaves a zombie process from last child
by ikegami (Patriarch) on Jun 01, 2013 at 23:15 UTC

    You find 1 yet-to-be reaped process wasteful, but you're ok with having N blocked processes??? I don't think you know what you want!!!

    That said, this is a better solution. You fork *before* a connection comes in, so there's less lag in handling a response. And since you reuse the child process, you don't waste time forking repeatedly. One might wonder why P::FM is used at all, but it causes children that die for whatever reason to be restarted, so you always have a full pool of children waiting!

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