I just had an afterthought I how you may experiment to force killing your detached threads. Use a shared variable $die and in your loop have return if $die. I'm not sure where to put it exactly in your code, but it would be a way to force breaking out of the while (<$out>) loop. It will force all detached threads to return. If it works for you, you can setup a shared hash, with a $shash{$thread_num}{'die'} for each thread, so you can control which threads get the $die=1 and return. You may also add a sub to perform in the thread when the die is received, like possibly closing the $out filehandle before returning. This is why I don't use Queue or any of the other thread conveyer belt modules, they separate you from full control. 
use threads::shared;
my $die : shared; #declare as shared before setting value
$die = 0;
 
while (<$out>) {
   return if $die;
   chomp;
   $err = 1 if (/^thread failed/);
   $Q->enqueue("$tid:$uut:$test:$_");
   last if ($err);
  }

while (1) {
  .......
  ........
 # put $die at an appropriate spot
$die =1;

......
}

[download]
I'm not really a human, but I play one on earth Remember How Lucky You Are

In reply to Re: cleanly exiting threads by zentara
in thread cleanly exiting threads by JoeKamel

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.