[imp] Search results of more than 100 messages cause 'error communicating with the server'

[Tim ODriscoll]

Quoting Arjen de Korte <arjen+horde at de-korte.org>:

> Citeren Tim ODriscoll <tim.odriscoll at lambrookschool.co.uk>:
>
>> When any of my users try searching for messages in a mailbox and  
>> the result returns more than 100 results, they get the error above:  
>> error communicating with the server.
>
> Could it be you're using GMail as IMAP server?

No, I'm using a Dovecot IMAP server on the same machine.


> I tried to duplicate this on a Dovecot IMAP server. It has no  
> problems returning searches resulting in several hundreds of  
> messages. My guess is that somehow your IMAP server is truncating  
> the number.

It used to work on the latest version of Horde 4, but the upgrade to  
H5 has caused this problem.

I've tried manually running the IMAP commands over a telnet session  
and it's working as expected. I can search and I get a list of message  
numbers back (in excess of 200 on some searches) and then I can fetch  
a resulting message from it's number.

I've tried turning off the Horde cache which had no effect and so it's  
left as using the file system.

A while ago there was a similar post on this list:  
http://bugs.horde.org/ticket/13264

That's where I got the idea to change the cache settings, but now I'm stuck..

Could it be a PHP problem? I recently upgraded the OS on the machine  
to the latest Ubuntu and the new PHP was a pain to get working  
properly because there were lots of modules that needed to be manually  
enabled. Could I have missed enabling one?

Many thanks for your help,

Tim