Hello Perl Monks,

I am using Thread::Pool to create a pool of threads (workers) (let's say 2) where my 10 processes can be queued and run in parallel, 2 at a time.

At some stage I want to abort the program. Usually some processes are finished, some are being processed and some are still pending to be processed in the pool.

What I do is to use the Thread::Pool->abort() method which, as I understood it, removes all pending processes and waits for all processed being processed right now. As soon as these are finished, then abort() returns.

Am I right to assume that at this stage, it is safe and proper to use Thread::Pool->shutdown() and then exit my program?

Unfortunately, when I call shutdown, I get a 'die' with the message:

Shutting down pool while there are still jobs to be done at /Library/Perl/5.10.0/Thread/Pool.pm (loaded on demand from offset 20056 for 2434 bytes) line 780

line 780 of Pool.pm is: 
die "Shutting down pool while there are still jobs to be done" 
if $belt->onbelt;

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I am running: 

This is perl, v5.10.0 built for darwin-thread-multi-2leve

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Below is an example code which demostrates the problem: 

#!/usr/bin/perl

use Thread::Pool;
use strict;
use warnings;

sub     my_process {
  print "Hi i am a spawned sub and I am sleeping. my ID is $_[0]\n";
  sleep(10); 
}
 
my $pool = Thread::Pool->new({
   workers => 2,
   maxjobs => 1,
   do => \&my_process
});
   
my ($i);
for($i=0;$i<10;$i++){ $pool->job($i); }

print "sleep for 5\n";
sleep(5);

print "will now abort\n";
$pool->abort();

print "will now shutdown\n";
$pool->shutdown();

print "all is normal but unfortunately i die before i come here\n";
exit(0);

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In reply to Thread::Pool shutdown dies after abort by Anonymous Monk

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