[horde] Class definition of Horde_Cache_emcache not found - Revisted

[d.hill at yournetplus.com]

Quoting Michael Rubinsky <mrubinsk at horde.org>:

>
> Quoting d.hill at yournetplus.com:
>
>> Quoting Michael Rubinsky <mrubinsk at horde.org>:
>>>
>>> Quoting d.hill at yournetplus.com:
>>>
>>>> Quoting Michael Rubinsky <mrubinsk at horde.org>:
>>>>
>>>>>
>>>>> Quoting d.hill at yournetplus.com:
>>>>>
>>>>>> I'm still getting an error relating to 'Class definition of  
>>>>>> Horde_Cache_emcache not found' periodically.
>>>>>>
>>>>>> I have added my email account as an admin so I could get the  
>>>>>> full error message. Being the content of the text is over  
>>>>>> 500Kb, here is a link to the text of what I receive periodically:
>>>>>>
>>>>>> http://mail.yournetplus.com/d.hill/Horde_Cache_emcache.txt
>>>>>>
>>>>>> I've changed all of the sensitive information (E.g. server  
>>>>>> domain names and passwords) to protect the innocent.
>>>>>>
>>>>>> Can anyone shed light as to what is going on? I have very  
>>>>>> little PHP experience to debug this issue.
>>>>>
>>>>> This is very bizarre.  It looks like you either have a corrupt  
>>>>> Cache.php file or a badly broken PHP build.
>>>>>
>>>>> Can you post what the factory() method looks like in  
>>>>> lib/Horde/Cache.php? Even better, you can place  
>>>>> var_dump($driver) statements in various locations in that method  
>>>>> and see where the string is losing the first character.
>>>>
>>>> Thanks for your quick response. I have placed var_dump($driver)  
>>>> after all of the if statements within that particular methond.
>>>
>>> ...and what are the results of the var_dump()s?
>>
>> The error has not occured as of yet. I'm assuming the var_dump()  
>> will show something in the logs. What would I be looking for? Also,  
>> is it going to show something on the dump page I get when the error  
>> occures?
>
> No, var_dump was a quick and dirty way of getting the value of that  
> variable...it will display on the screen.  If you want it to appear  
> in the log, you should do something like:
>
> Horde::logMessage(print_r($driver, true), _FILE__, __LINE__, PEAR_LOG_DEBUG);
>
> ..and this will not happen only if there is an error - it will log  
> every time.

I must not be looking for the correct log line. I've looked in the  
horde log and apache log and don't see anything that sticks out.

This is the error in the logs when it happens:

[Mon Aug 03 00:25:05 2009] [error] [client 173.29.174.24] PHP Warning:  
  include_once() [<a href='function.include'>function.include</a>]:  
Failed opening 'Horde/Cache/emcache.php' for inclusion  
(include_path='/usr/local/www/apache22/data/horde/lib:/usr/local/www/apache22/data/horde/lib/../pear') in /usr/local/www/apache22/data/horde/lib/Horde/Cache.php on line 181, referer:  
http://webmail.yournetplus.com/services/portal/sidebar.php