[Tickets #12458] IMAP Cache Problem

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Ticket URL: http://bugs.horde.org/ticket/12458
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  Ticket             | 12458
  Created By         | busywater at gmail.com
  Summary            | IMAP Cache Problem
  Queue              | IMP
  Version            | 6.1.2
  Type               | Bug
  State              | Unconfirmed
  Priority           | 2. Medium
  Milestone          |
  Patch              |
  Owners             |
------------------------------------------------------------------------------


busywater at gmail.com (2013-07-15 02:03) wrote:

My environment is as follows:
dovecot 2.2.4
Imapproxy 1.2.7
horde 5.1.1
imp 6.1.2
Redis (2.6.14) as caching driver

When I turn on cache = 'cache' in imp backend.local.php, I got the 'Error
when communicating with the server' in viewing the email box.  The  
apache logs show:

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP Fatal error:  Call
to a member function get() on a non-object in
/usr/share/php/Horde/Cache/Storage/Hashtable.php on line 68, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP Stack trace:,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   1. {main}()
/var/www/html/webmail/services/ajax.php:0, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   2.
Horde_Core_Ajax_Application->doAction()
/var/www/html/webmail/services/ajax.php:58, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   3.
call_user_func() /usr/share/php/Horde/Core/Ajax/Application.php:162,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   4.
IMP_Ajax_Application_Handler_Dynamic->dynamicInit()
/usr/share/php/Horde/Core/Ajax/Application.php:162, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   5.
Horde_Core_Ajax_Application->callAction()
/var/www/html/webmail/imp/lib/Ajax/Application/Handler/Dynamic.php:373,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   6.
call_user_func() /usr/share/php/Horde/Core/Ajax/Application.php:232,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   7.
IMP_Ajax_Application_Handler_Common->viewPort()
/usr/share/php/Horde/Core/Ajax/Application.php:232, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   8.
IMP_Ajax_Application->viewPortData()
/var/www/html/webmail/imp/lib/Ajax/Application/Handler/Common.php:99,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP   9.
IMP_Ajax_Application_ListMessages->listMessages()
/var/www/html/webmail/imp/lib/Ajax/Application.php:246, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  10.
IMP_Imap->openMailbox()
/var/www/html/webmail/imp/lib/Ajax/Application/ListMessages.php:133,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  11.
IMP_Imap->__call()
/var/www/html/webmail/imp/lib/Ajax/Application/ListMessages.php:133,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  12.
call_user_func_array() /var/www/html/webmail/imp/lib/Imap.php:569, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  13.
Horde_Imap_Client_Base->openMailbox()
/var/www/html/webmail/imp/lib/Imap.php:569, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  14.
Horde_Imap_Client_Socket->_openMailbox()
/usr/share/php/Horde/Imap/Client/Base.php:978, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  15.
Horde_Imap_Client_Cache->getMetaData()
/usr/share/php/Horde/Imap/Client/Socket.php:923, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  16.
Horde_Imap_Client_Cache_Backend_Cache->getMetaData()
/usr/share/php/Horde/Imap/Client/Cache.php:173, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  17.
Horde_Imap_Client_Cache_Backend_Cache->_loadSliceMap()
/usr/share/php/Horde/Imap/Client/Cache/Backend/Cache.php:255, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  18.
Horde_Cache->get()
/usr/share/php/Horde/Imap/Client/Cache/Backend/Cache.php:435, referer:
https://mail.domain.org/imp/dynamic.php?page=mailbox

[Wed Jul 10 00:32:47 2013] [error] [client 1.2.3.4] PHP  19.
Horde_Cache_Storage_Hashtable->get() /usr/share/php/Horde/Cache.php:97,
referer: https://mail.domain.org/imp/dynamic.php?page=mailbox


However, when logout and login horde, the error does not appear and  
IMP become functional again.  So, it is not good to ask the users to  
try login agin to make viewing emails possible.  There is no choice  
but to turn off caching of imap backend by
setting 'cache' => false.


Please offer help.  Thanks.