rfc - generated cache names are too long

[GoogleCodeExporter]

What steps will reproduce the problem?
1. create a whole lot of css files
2. include them in a page
3. refresh so that the cache is generated

What is the expected output? What do you see instead?
a file name that the server can render. something like a hash and link the hash 
internally to that long string possibly 

error log:
[Thu Nov 04 01:29:33 2010] [error] [client 127.0.0.1] (36)File name too long: 
access to 
/cc.8d06446468a1b74b8b379d1462beb5a8.assets,_css,_960gs,_960,s+assets,_css,_admi
n_nav,s+assets,_css,_960gs,_uncompressed,_demo,s+assets,_css,_jquery_ui,s+projec
ts,_css,_projects,s+gallery,_css,_gallery,s+gallery,_css,_style_1,s+thickbox,_cs
s,_thickbox,s+contact,_css,_contact,s+comments,_css,_comment,s+filter,_css,_filt
er,s+tags,_css,_tags,s+debug_kit,_css,_debug_toolbar,s.css failed, referer: 
http://dogmatic69.dev/admin

What version of the product are you using? On what operating system?
mod_pagespeed 64-bit .deb ubuntu 10.10 x64 + 5.3.3-1ubuntu9.1 + Apache/2.2.16 
(Ubuntu)

Please provide any additional information below.
long file names generate a 403 Forbidden for anyone else that gets this

Original issue reported on code.google.com by dogmatic69 on 4 Nov 2010 at 2:02

[GoogleCodeExporter]

Thanks for the report.  As a workaround, you can disable 'combine_css' with:

kModPagespeedDisableFilters combine_css

in pagespeed.conf.  But I am curious what software is complaining about this 
particular case.   The URL in the issue report is about 423 characters long.  
This is too long for a single-leaf filename, but mod_pagespeed does not need to 
use the URL as a filename.

Does anyone know what module would be printing this format of error message?

[Thu Nov 04 01:29:33 2010] [error] [client 127.0.0.1] (36)File name too long: 
access to ....

I just tried to search for "File name too long: access to " and I saw this 
error reported multiple times over the last few years, including:

https://issues.apache.org/bugzilla/show_bug.cgi?id=49131

I wonder if there's a simple patch to a mod_*.c file somewhere that could bump 
up a buffer size  to a higher limit. 

Original comment by jmara...@google.com on 4 Nov 2010 at 3:11

[GoogleCodeExporter]

here are all the modules that are enabled on my install

[public_html dev ↑⚡] $ apache2 -l
Compiled in modules:
  core.c
  mod_log_config.c
  mod_logio.c
  prefork.c
  http_core.c
  mod_so.c
[public_html dev ↑⚡] $ ls /etc/apache2/mods-enabled/
alias.conf            autoindex.load  negotiation.conf  reqtimeout.load
alias.load            cgi.load        negotiation.load  rewrite.load
auth_basic.load       deflate.conf    pagespeed.conf    setenvif.conf
authn_file.load       deflate.load    pagespeed.load    setenvif.load
authz_default.load    dir.conf        php5.conf         status.conf
authz_groupfile.load  dir.load        php5.load         status.load
authz_host.load       env.load        proxy.conf
authz_user.load       mime.conf       proxy.load
autoindex.conf        mime.load       reqtimeout.conf

Its pretty much the default php5 install from apt-get install php5, i found 
some sites last night with this error being reported to apache 
https://issues.apache.org/bugzilla/show_bug.cgi?id=45187

Original comment by dogmatic69 on 4 Nov 2010 at 8:44

[GoogleCodeExporter]

Same error here.

*What version of the product are you using? On what operating system?*
mod_pagespeed 32-bit .deb, Ubuntu/10.04 x32 + PHP/5.3.2-1ubuntu4.5 + 
Apache/2.2.14-5ubuntu8.3

Original comment by zee...@gmail.com on 4 Nov 2010 at 11:56

[GoogleCodeExporter]

Original comment by sligocki@google.com on 5 Nov 2010 at 10:54

[GoogleCodeExporter]

I'm also experiencing this issue. Long URLs generated by the combine CSS filter 
are returning 403 forbidden

Original comment by daniel.b...@gmail.com on 5 Nov 2010 at 11:20

[GoogleCodeExporter]

I found the source of the problem in the httpd source.

I believe httpd is applying posix pathname limitations to URLs.  This is 
unfortunate as URLs can be much longer; there's no need for them to be limited 
by the file system.

But the only filter that's likely to be affected is combine_css and we'll put a 
ceiling on the pathnames that it generates to avoid this problem.

Original comment by jmara...@google.com on 5 Nov 2010 at 11:33

[GoogleCodeExporter]

the reason it does that is because it first looks to see if there is a file of 
that name for some reason. This has been filed as a bug many times at apache 
and they will not fix it (going back 3 years or so) 

Original comment by dogmatic69 on 6 Nov 2010 at 1:39

[GoogleCodeExporter]

Original comment by jmara...@google.com on 8 Nov 2010 at 2:58

• Changed title: rfc - generated cache names are too long

[GoogleCodeExporter]

This has been fixed in the trunk, but the fix is not available in a binary 
release yet.

SVN trunk revision 180 has this change:  

http://code.google.com/p/modpagespeed/source/detail?r=180

Original comment by jmara...@google.com on 11 Nov 2010 at 6:32

• Changed state: Fixed

[oTnarP]

Anyone used "Long Path Tool" for this error?

[jmarantz]

Note that this bug was fixed well over 4 years ago. Sabbir786: what are you seeing exactly?