[SOLVED] Can't upload attachments over 121kb

[transmobius]

We are running Roundcube v0.8.1 under Debian 6.0/Squeeze with PHP v5.3.3 and Apache v2.2.16.

Any file, of any type, over 121kb can not be uploaded as an attachment.  Anything smaller uploads immediately.  Have tried under 2 different versions of Firefox and 2 of IE.  Anything larger just spins saying 'Uploading file...' and never completes.  The tiny files do end up in the proper temp directory and can be sent.

Attachment variables are upload_max_filesize = 12M, post_max_size = 15M, memory_limit = 256M (in both php.ini and .htaccess).  The attachment window does say that the max allowed size is 12MB.

This is a recent problem noticed on v0.8.1 on a long standing install that has been upgraded in place over many versions of Roundcube.

Anyone have any ideas?

[SKaero]

Do any error show up anywhere?

[transmobius]

No, none that I've found anyway.

[SKaero]

So no errors in the RoundCube error log (make sure the logs folder is writable) and nothing in the web server error logs and noting showing up in the bowsers JS console?

[transmobius]

Log directory is writable and contain a few non-related entries. 

Apache log (loglevel=debug) yields:
Deprecated:  Directive 'register_long_arrays' is deprecated in PHP 5.3 and greater in Unknown on line 0
Deprecated:  Directive 'magic_quotes_gpc' is deprecated in PHP 5.3 and greater in Unknown on line 0
[Thu Sep 13 15:42:40 2012] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 0 in child 15146 for worker proxy:reverse
[Thu Sep 13 15:42:40 2012] [debug] proxy_util.c(1837): proxy: worker proxy:reverse already initialized
[Thu Sep 13 15:42:40 2012] [debug] proxy_util.c(1934): proxy: initialized single connection worker 0 in child 15146 for (*)


Firefox Web Console DOES report something!
[15:42:30.452] POST https://XXXX/mail/?_task=mail&_id=66199550050525ffd73d1c&_uploadid=1347576150154&_action=upload [HTTP/1.1 500 Internal Server Error 1498ms]

So, we're getting a 500 Internal Server Error, but no detail in the Apache logs . . .

[SKaero]

That error should be reported somewhere, that would have the information needed to figure out the problem.

[transmobius]

Spoke too soon, this particular sub-domain has separate error log!  Here is what an 136KB attachment causes:

mod_fcgid: HTTP request length 138109 (so far) exceeds MaxRequestLen (131072), referer: https://XXXXX/mail/?_task=mail&_id=17869668305053d9fc8b7a9&_action=compose

So, we need to edit /etc/apache2/mods-available/fcgid.conf and add (for 12MB attachments)
FcgidMaxRequestLen 12288000

Tested and working.  Thanks for walking me through it SKaero, sometimes I really need a sounding board.

For anyone else that wants the reference doco, see:
http://httpd.apache.org/mod_fcgid/mod/mod_fcgid.html
especially the section http://httpd.apache.org/mod_fcgid/mod/mod_fcgid.html#fcgidmaxrequestlen