Server Error! (OK) on big AJAX response in Firefox

[patrick]

I have a mailbox that contains 2354 messages from a mailing list. When I try to open it with Roundcube (SVN r4273), after a short time, I get "Server Error! (OK)", and the list pane stays empty.

I enabled IMAP debug ($rcmail_config['imap_debug'] = true;), but can't see anything wrong there. I'm attaching the imap debug log (nearly 1 MB after unpacking). Opening the mailbox with other MUAs (KMail, Thunderbird) works just fine.

What else can I do to help fixing this?

[alec]

Enable browser's console and check what is returned by server to the browser. Did you test with different browsers? There was similiar issue with IE when response contains "strange" characters, but this shouldn't happen anymore.

[patrick]

Replying to alec:
Interesting. It works without a problem in Chromium (9.0.587.0). I got the error in Firefox (3.6.12). The error console of Firefox doesn't show anything interesting - only a couple of warnings about unknown CSS properties, and this:

Warning: Unexpected token in attribute selector: '!'.
Source File: ​https://patrick-nagel.net/roundcube/?_task=mail&_mbox=Lists.Wave
Line: 0

(but this I also get for the Inbox, which opens without a problem):

Warning: Unexpected token in attribute selector: '!'.
Source File: ​https://patrick-nagel.net/roundcube/
Line: 0

[alec]

This is just a warning (from jquery). I was talking about a Firebug console to check server response for ajax request. You can also set debug_level=9 to enable built-in console.

[patrick]

Replying to alec:

I was talking about a Firebug console to check server response for ajax request. You can also set debug_level=9 to enable built-in console.

Ok, I didn't get that.
The built-in console didn't bring up anything useful. Firebug had this:

{{{script stack space quota is exhausted
Line 31}}}
(jquery-1.4.min.js)

I'm not very familiar with this kind of debugging - if you tell me exact steps on how to obtain more useful information, I'll do that. Alternatively, I can try to set up an account on that server, with that mailbox copied over, so that you can debug yourself, if you want.

[alec]

This error (?) message is interesting. Do a test with smaller pagesize (what pagesize are you using now?). Also you could try with older version of jquery.

[alec]

This is more likely a Firefox+jQuery issue e.g. reported here ​http://forum.jquery.com/topic/validating-json-unnecessarily-is-killing-firefox

[patrick]

Replying to alec:

This error (?) message is interesting. Do a test with smaller pagesize (what pagesize are you using now?).

I was using a page size of 200 rows. When I set it to 182 rows, there is no error, but with 183, the error is back. Due to threading, there are actually many more rows (when expanding the threads) than the number of rows set in the prefs. So, as a workaround, I'll halve my pagesize.

[alec]

I've found that the limit is c.a. 1000 messages.

[patrick]

Replying to alec:
Well, that's easily reached in mailing list mailboxes with threaded view. For example, in my Lists.Wave mailbox, the last 200 threads amount to 1493 mails.

I didn't really understand what the exact problem with Firefox and jQuery was... has it been fixed, or can/will it be fixed? When will Roundcube users profit from the fix?

[alec]

We need to wait for jQuery or FF developers. jQuery uses some regular expression to parse (check) ajax response. When the result is big it reaches FF limit of stack size for such operations.

[alec]

Still not fixed in jQuery. The limit has been increased greatly in FF4.

[alec]

Finally patch has been applied into jQuery repository. We must wait for 1.6.

[phs]

As Alec already mentioned, this problem is fixed in jQuery 1.6 (see jQuery ticket ​http://bugs.jquery.com/ticket/7587 ).

Therefore this ticket would be resolved by updating Roundcube to jQuery 1.6.

[alec]

Update jQuery in [79275b4d].