Bug: File Not Found Errors When Switching to ModPerl

I hope I'm doing the right thing by opening a bug report instead of adding to ModPerl or TigerSkin...

Everthing was working fine, if a little slowly. Some of the other pages on performance mention mod_perl makes an improvement. I installed mod_perl using CPAN.

Test case

• modified twiki/bin/.htaccess as per ModPerl page
• modified /var/www/conf/httpd.conf in the same spirit:

    # added by matt, modified 28-September-2001
    ScriptAlias /twiki/bin/ "/var/www/twiki/bin/"
    Alias /twiki/ "/var/www/twiki/"
    <Directory "/var/www/twiki/bin">
       #SetHandler cgi-script
       SetHandler perl-script
       PerlHandler Apache::Registry
       Options ExecCGI
       PerlSendHeader On
       AllowOverride all
       Allow from all
    </Directory>
    <Directory "/var/www/twiki/pub">
       Options FollowSymLinks +Includes
       AllowOverride None
       Allow from all
    </Directory>

* restarted apache and ...yuk, all the icons and graphics disappeared (I'm using TigerSkin). These errors are showing up in my apache log:

[Fri Sep 28 15:24:25 2001] [notice] Apache/1.3.19 (Unix) mod_perl/1.26 configured -- resuming normal operations
[Fri Sep 28 15:24:57 2001] view: Use of uninitialized value in string eq at ../lib/TWiki.pm line 444.
[Fri Sep 28 15:24:57 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 62.
[Fri Sep 28 15:24:57 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 62.
[Fri Sep 28 15:24:57 2001] view: Subroutine initPlugin redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 55.
[Fri Sep 28 15:24:57 2001] view: Subroutine DISABLE_commonTagsHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 77.
[Fri Sep 28 15:24:57 2001] view: Subroutine DISABLE_startRenderingHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 92.
[Fri Sep 28 15:24:57 2001] view: Subroutine DISABLE_outsidePREHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 105.
[Fri Sep 28 15:24:57 2001] view: Subroutine DISABLE_insidePREHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 118.
[Fri Sep 28 15:24:57 2001] view: Subroutine DISABLE_endRenderingHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 131.
[Fri Sep 28 15:24:57 2001] view: Subroutine initializeUserHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 142.
[Fri Sep 28 15:24:57 2001] view: Subroutine registrationHandler redefined at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 166.
[Fri Sep 28 15:24:57 2001] view: Use of uninitialized value in split at ../lib/TWiki/Plugins/UserCookiePlugin.pm line 144.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 323.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 324.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 329.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 329.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Store.pm line 1234.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in string eq at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 216.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in string eq at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 216.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in string eq at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 216.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in string eq at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 216.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Store.pm line 1367.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Store.pm line 1367.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Store.pm line 1234.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Store.pm line 1234.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in substitution (s///) at ../lib/TWiki.pm line 1274.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki.pm line 1289.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki.pm line 1290.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki/Plugins/TigerSkinPlugin.pm line 79.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki.pm line 1289.
[Fri Sep 28 15:24:58 2001] view: Use of uninitialized value in concatenation (.) or string at ../lib/TWiki.pm line 1290.
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/twiki.css
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/menuscript.js
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/line1.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/transp_black.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/topbit_twiki.jpg
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/logo.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/top_curve.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/transp.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/question_mark.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/green_arrow2.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/icon_pencil.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/editpage.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/twikilogo3.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/greenfolder.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/bottom_curve.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/green_arrow.gif
[Fri Sep 28 15:24:58 2001] [error] [client 199.247.173.75] File does not exist: /var/www/twiki/pub/pub/TWiki/TigerSkin/dottedVR.gif

(Notice the double '/pub/pub/')

-- MattWilkie - 28 Sep 2001

Fix record

This problem may not be related to mod_perl (?)

* I removed the Tiger, Session, and UserCookie plugins. * I restored the original Sept01 TWIki files changed by the plugins (TWikie.pm, register, etc.) * I restored the original httpd.conf and bin/.htaccess settings

...and still recieved the "uninitialized value" and "pub/pub" error messages.

So, I edited TWiki.cfg to:

#                   %PUBURLPATH% : Public data path of TWiki URL (root of attachments) :
# mattwilkie note: this was originally "/twiki/pub" but it broke when I upgraded perl to 5.6.1 and installed mod_perl
$pubUrlPath       = "/twiki";
#                   Public data directory, must match $pubUrlPath :
$pubDir           = "/var/www/twiki/pub";

Which fixed the problem. I have since reinstalled TigerSkinPlugin? , but not the other two, and the problem did not reappear. While I may be misremembering things I did or did not do before encountering (creating?) and attempting to remedy the problem, the one thing I am sure I didn't do is modify TWiki.cfg.

Notes:

* In order to install mod_perl I needed to upgrade to perl-5.6.1, which I did using CPAN. * Although I turned off (I think?) mod_perl by removing the PerlHandler? statements mod_perl is still loaded by Apache.

-- MattWilkie - 02 Oct 2001

Environment

TWiki version:	2001September01
TWiki plugins:	TigerSkinPlugin? , SessionPlugin? , UserCookiePlugin?
Server OS:	Tru64 v5.0 (alpha_dec_osf)
Web server:	Apache 1.3.19
Perl version:	5.6.1
Client OS:	n/a
Web Browser:	n/a

-- MattWilkie - 28 Sep 2001