While your question has already been answered, you should also check the timeout settings of the old vs new webserver, especially if you have some long running scripts.

Also, if you're getting a lot of webcalls (you are implementing some API or something), i would check the new system for any anti-flooding/anti-ddos settings/daemons. While having these is generally a good idea, it's quite annoying when you are doing some API tests and the server suddenly decides to IPTable your home IP for a day. I can neither confirm nor deny that tools like this are a two-edged sword and may or may not have bugs that prevent the tool from removing entries from the block list after the expiry time.

PerlMonks XP is useless? Not anymore: XPD - Do more with your PerlMonks XP

In reply to Re: upstream prematurely closed connection while reading response header from upstream by cavac
in thread upstream prematurely closed connection while reading response header from upstream by Digioso

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.