I don't have an answer to your main question (yet), but I can tell you that this:

    my $t = scalar (@temp);
    splice (@temp,$t-1,1) if ($t );
    @jobstack=@temp;

[download]

Is a really slow, clumsy and silly way of doing this:

pop @jobstack.

[download]

which is exactly equivalent and about 100 times faster (depending upon how mush data is in @jobstack.

But the way you are using @jobstack suggests that you really ought to be using a Thread::Queue.

Whether that would have any influence upon your main problem I don;t have the facilities to test, but it would definitely make it easier to reason about the possible causes by eliminating one possible source of errors.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: strange behaviour, would appreciate any comment / alternative method by BrowserUk
in thread strange behaviour, would appreciate any comment / alternative method by djamu

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