|
|
Intro to Mod_Perl
Page 9 —
Fixing Bugs
Now that we've got enough background to code using mod_perl, let's take a
quick look at what to do when something goes wrong. The first and most
important place to start debugging is in the server's error
log. For example, if your module does not end with 1; or return true, you
may find something like this in your error log.
[Sun Sep 13 21:07:43 1998] [error] Apache/Add_Header.pm did not return a
true value at (eval 4) line 2.
Based on this information, we can get an idea of where to look for the
error.
If you had a syntax error in your script, you'll also know where to find it:
[Sun Sep 13 21:43:34 1998] [error] Missing right bracket at
/usr/lib/perl5/site_perl/Apache/Add_Header.pm line 71, at end of line
If you correct your code, but that doesn't seem to have any impact on how
the script is executed, remember that scripts are cached in memory and they
stay there until told otherwise. So to check your changes, send your server
the HUP signal handler to have it recompile all the modules.
next page»
|
|
|
