You have already stated that the problem only occurs when Apache is involved.

Have you stopped and restarted Apache?

Does the problem persist when the Perl script is run as a CGI program instead of being run as a mod_perl script?

Check the versions of all modules loaded into mod_perl and compare them between the two machines:

for my $module (sort keys %INC) {
    (my $namespace = $module) =~ s!/!::!g;
    $namespace =~ s/\.pm$//;
    print sprintf "Module: %s; Path: %s; Size: %d; VERSION: %s\n",
        $module, $INC{$module}, -s($INC{$module}), $namespace->VERSION
+;
}

[download]

Note that you need to run the above output from within Apache, because when run from the shell everything seems to be OK for you.

In reply to Re^9: JSON::XS and blessings by Corion
in thread JSON::XS and blessings by cshavit

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.