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Re: While loop not exiting when expected.

by broquaint (Abbot)
on Jun 25, 2004 at 10:16 UTC ( #369587=note: print w/replies, xml ) Need Help??

in reply to While loop not exiting when expected.

I can't see the problem presently, but this does seem like a pretty ideal solution for Parallel::ForkManager
use Parallel::ForkManager; open my $fh, '<', 'foo.csv' or die "ack: $!"; my $pm = Parallel::ForkManager->new( MAX_KIDS ); while(<$fh>) { my $pid = $pm->start and next; { your_sub( split ',' ); } $pm->end; }


update: s/Parra/Para/g, thanks to liz and Albannach for picking up on that one

Replies are listed 'Best First'.
Re^2: While loop not exiting when expected.
by BazB (Priest) on Jun 25, 2004 at 10:22 UTC

    broquaint, thanks.
    I am aware of Parallel::ForkManager, but I figured it wasn't worth the grief of installing an extra module for a relatively small amount of code.

    Of course, that was before I realised my code wasn't playing nice...

    Update: I've tried broquaint's suggestion of Parallel::ForkManager, and that suffers from the same problem on Solaris (5.6.1 and 5.8.4), but is fine on Linux.

    Update 2: I tried another tactic - don't read the configuration file and fork children in a single loop.
    Instead, I open and read the configuration file and store the information in an array, then iterate over the array using foreach, kicking off children and reaping as before.
    This approach does work correctly, but still doesn't reveal why the original code fails.

    If the information in this post is inaccurate, or just plain wrong, don't just downvote - please post explaining what's wrong.
    That way everyone learns.

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