Here is an example that more closely approximate my app's situation: 
use strict;

use threads;
use threads::shared;
use Thread::Pool;

my $signal = undef;
share($signal);
my $fct = 
        sub {
            require Blah; Blah->import(); 
            $signal = 1;
        };
print "Starting the Thread::Pool\n";
my $pool = Thread::Pool->new(
                {do => $fct});
print "Thread::Pool started\n";

print "Sending a job to the Thread::Pool\n";
$pool->job();
print "Job sent to the Thread::Pool\n";

print "Waiting for the slave thread to set the shared signal\n";
while (!$signal) {
    print "Sleeping and waiting for signal from slave thread\n";
    sleep(1);
}
print "Got shared signal from slave thread\n";

$pool->shutdown();

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When I run it, I get: 
Starting the Thread::Pool

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And it gets stuck there, without outputting any error message. Obviously here, the slave gets a slice of CPU, since I sleep for 1 second between polls of the shared signal.

Note that if I coment out the faulty require line, I do get the proper behaviour, i.e. the script prints: 
Starting the Thread::Pool
Thread::Pool started
Sending a job to the Thread::Pool
Job sent to the Thread::Pool
Waiting for the slave thread to set the shared signal
Sleeping and waiting for signal from slave thread
Got shared signal from slave thread

[download]

In reply to Re^5: Why do my threads sometimes die silenty? by alain_desilets
in thread Why do my threads sometimes die silenty? by alain_desilets

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