If your output stops halfway through printing a variable, the odds are that your debugging output is Suffering From Buffering. Fixing that won't fix your original problem, but may help you debug it.

As for what it is, many possibilities exist. You might be just triggering sendmail's check for being used to send spam (at which point it deliberately slows down). Perhaps you have one particular place you send information which hangs for reasons beyond your control. (In which case it might make sense to use Parallel::ForkManager to run several processes in parallel, so that one hangs and the rest go to their destination.) It could be something else.

For a random example of "something else", I am in the process of diagnosing a sporadic hang at work which I have tracked down to probably being delays in closing a database connection. (It is now in the hands of some network folks.)

In reply to Re (tilly) 1: Program hangs by tilly
in thread Program hangs by Stegalex

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.