elusive missing first character and blank page problem

[Per olof Ljungmark]

Hi,

This problem has plagued us now for nearly half a year and this time I'm
determined to nail it down. If someone reading this has even a remote
idea of how I should take it further PLEASE let me know.

I have looked at bugs.horde.org and did not find anything that matches
the below.

All software versions are latest stable just now but problem is seen
through several OS and Apache/PHP/Horde upgrades.


At random, an action inside Horde, it could be a mailbox refresh,
compose a message, open the address book or whatever, the user is
presented with a blank page. So, it works most of the time but not every
time and it is getting worse as well. Happens with both cache activated
and not activated.

This will be seen in the Apache access log as a 500 error.

Switched logging to E_ALL:

Warning: include_once(Horde/Cache/one.php) [function.include-once]:
failed to open stream: No such file or directory in
/usr/local/www/horde/lib/Horde/Cache.php on line 174

Warning: include_once() [function.include]: Failed opening
'Horde/Cache/one.php' for inclusion
             ^^^^^
(include_path='/usr/local/www/horde/lib:/usr/local/share/pear:.') in
/usr/local/www/horde/lib/Horde/Cache.php on line 174

Fatal error: Call to undefined method PEAR_Error::get() in
/usr/local/www/horde/lib/Horde/Perms/sql.php on line 270

What part of Horde is calling "Horde/Cache/one.php"? It does look like
this call is the one that misses the first character.


Just to see what happened, I copied the Horde cache files to identical
ones less the first letter, none.php -> one.php etc.
If I change the cache to for example memcache the error will be
identical in behaviour but read "'Horde/Cache/emcache.php' instead

Then there is still the blank page but the missing first character
problem is not logged, only the last line:

PHP Fatal error:  Call to undefined method PEAR_Error::get() in
/usr/local/www/horde/lib/Horde/Perms/sql.php on line 270

This is the only line that is logged.

horde.log (at debug level) only says

Jul 05 21:24:15 HORDE [debug] [imp] Max memory usage: 2359296 bytes [pid
10772 on line 339 of "/usr/local/www/horde/lib/Horde/Registry.php"]


ANY hints greatly appriciated!

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[Jan Schneider]

Zitat von Per olof Ljungmark <peo@...>:

> Hi,
>
> This problem has plagued us now for nearly half a year and this time  
> I'm determined to nail it down. If someone reading this has even a  
> remote idea of how I should take it further PLEASE let me know.
>
> I have looked at bugs.horde.org and did not find anything that  
> matches the below.
>
> All software versions are latest stable just now but problem is seen  
> through several OS and Apache/PHP/Horde upgrades.
>
>
> At random, an action inside Horde, it could be a mailbox refresh,  
> compose a message, open the address book or whatever, the user is  
> presented with a blank page. So, it works most of the time but not  
> every time and it is getting worse as well. Happens with both cache  
> activated and not activated.
>
> This will be seen in the Apache access log as a 500 error.
>
> Switched logging to E_ALL:
>
> Warning: include_once(Horde/Cache/one.php) [function.include-once]:  
> failed to open stream: No such file or directory in  
> /usr/local/www/horde/lib/Horde/Cache.php on line 174
>
> Warning: include_once() [function.include]: Failed opening  
> 'Horde/Cache/one.php' for inclusion
>             ^^^^^
> (include_path='/usr/local/www/horde/lib:/usr/local/share/pear:.') in  
> /usr/local/www/horde/lib/Horde/Cache.php on line 174
>
> Fatal error: Call to undefined method PEAR_Error::get() in  
> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>
> What part of Horde is calling "Horde/Cache/one.php"? It does look  
> like this call is the one that misses the first character.
>
>
> Just to see what happened, I copied the Horde cache files to  
> identical ones less the first letter, none.php -> one.php etc.
> If I change the cache to for example memcache the error will be  
> identical in behaviour but read "'Horde/Cache/emcache.php' instead
>
> Then there is still the blank page but the missing first character  
> problem is not logged, only the last line:
>
> PHP Fatal error:  Call to undefined method PEAR_Error::get() in  
> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>
> This is the only line that is logged.
>
> horde.log (at debug level) only says
>
> Jul 05 21:24:15 HORDE [debug] [imp] Max memory usage: 2359296 bytes  
> [pid 10772 on line 339 of  
> "/usr/local/www/horde/lib/Horde/Registry.php"]
>
>
> ANY hints greatly appriciated!

Add a var_dump(debug_backtrace()); before that line Cache.php, to see  
where this driver name is coming from.

Jan.

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[Per olof Ljungmark]

Jan Schneider wrote:

> Zitat von Per olof Ljungmark <peo@...>:
>
>> Hi,
>>
>>
>> At random, an action inside Horde, it could be a mailbox refresh,
>> compose a message, open the address book or whatever, the user is
>> presented with a blank page. So, it works most of the time but not
>> every time and it is getting worse as well. Happens with both cache
>> activated and not activated.
>>
>>
>> Warning: include_once(Horde/Cache/one.php) [function.include-once]:
>> failed to open stream: No such file or directory in
>> /usr/local/www/horde/lib/Horde/Cache.php on line 174
>>
>> Warning: include_once() [function.include]: Failed opening
>> 'Horde/Cache/one.php' for inclusion
>>             ^^^^^
>> (include_path='/usr/local/www/horde/lib:/usr/local/share/pear:.') in
>> /usr/local/www/horde/lib/Horde/Cache.php on line 174
>>
>> Fatal error: Call to undefined method PEAR_Error::get() in
>> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>>
>> What part of Horde is calling "Horde/Cache/one.php"? It does look like
>> this call is the one that misses the first character.
>>
>> PHP Fatal error:  Call to undefined method PEAR_Error::get() in
>> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>>
>
> Add a var_dump(debug_backtrace()); before that line Cache.php, to see
> where this driver name is coming from.

This resulted in a lot of screen output when the error happened, but
there are no references to "emcache" in this output, only to the correct
"memcache".

php log now contains two more lines:

[14-Jul-2009 01:06:09] PHP Warning:  Cannot modify header information -
headers already sent by (output started at
/usr/local/www/horde/lib/Horde/Cache.php:174) in
/usr/local/www/horde/services/javascript.php on line 34

[14-Jul-2009 01:06:09] PHP Warning:  Cannot modify header information -
headers already sent by (output started at
/usr/local/www/horde/lib/Horde/Cache.php:174) in
/usr/local/www/horde/services/javascript.php on line 35

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[Jan Schneider]

Zitat von Per olof Ljungmark <peo@...>:

> Jan Schneider wrote:
>> Zitat von Per olof Ljungmark <peo@...>:
>>
>>> Hi,
>>>
>>>
>>> At random, an action inside Horde, it could be a mailbox refresh,  
>>> compose a message, open the address book or whatever, the user is  
>>> presented with a blank page. So, it works most of the time but not  
>>> every time and it is getting worse as well. Happens with both  
>>> cache activated and not activated.
>>>
>>>
>>> Warning: include_once(Horde/Cache/one.php)  
>>> [function.include-once]: failed to open stream: No such file or  
>>> directory in /usr/local/www/horde/lib/Horde/Cache.php on line 174
>>>
>>> Warning: include_once() [function.include]: Failed opening  
>>> 'Horde/Cache/one.php' for inclusion
>>>            ^^^^^
>>> (include_path='/usr/local/www/horde/lib:/usr/local/share/pear:.')  
>>> in /usr/local/www/horde/lib/Horde/Cache.php on line 174
>>>
>>> Fatal error: Call to undefined method PEAR_Error::get() in  
>>> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>>>
>>> What part of Horde is calling "Horde/Cache/one.php"? It does look  
>>> like this call is the one that misses the first character.
>>>
>>> PHP Fatal error:  Call to undefined method PEAR_Error::get() in  
>>> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>>>
>>
>> Add a var_dump(debug_backtrace()); before that line Cache.php, to  
>> see where this driver name is coming from.
>
> This resulted in a lot of screen output when the error happened, but  
> there are no references to "emcache" in this output, only to the  
> correct "memcache".
>
> php log now contains two more lines:
>
> [14-Jul-2009 01:06:09] PHP Warning:  Cannot modify header  
> information - headers already sent by (output started at  
> /usr/local/www/horde/lib/Horde/Cache.php:174) in  
> /usr/local/www/horde/services/javascript.php on line 34
>
> [14-Jul-2009 01:06:09] PHP Warning:  Cannot modify header  
> information - headers already sent by (output started at  
> /usr/local/www/horde/lib/Horde/Cache.php:174) in  
> /usr/local/www/horde/services/javascript.php on line 35
>

The you have a badly broken PHP. There is no way a not-broken PHP  
could make "emache" from a "memcache" passed to Horde_Cache::factory().

Jan.

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[Per olof Ljungmark]

Jan Schneider wrote:

> Zitat von Per olof Ljungmark <peo@...>:
>
>> Jan Schneider wrote:
>>> Zitat von Per olof Ljungmark <peo@...>:
>>>
>>>> Hi,
>>>>
>>>>
>>>> At random, an action inside Horde, it could be a mailbox refresh,
>>>> compose a message, open the address book or whatever, the user is
>>>> presented with a blank page. So, it works most of the time but not
>>>> every time and it is getting worse as well. Happens with both cache
>>>> activated and not activated.
>>>>
>>>>
>>>> Warning: include_once(Horde/Cache/one.php) [function.include-once]:
>>>> failed to open stream: No such file or directory in
>>>> /usr/local/www/horde/lib/Horde/Cache.php on line 174
>>>>
>>>> Warning: include_once() [function.include]: Failed opening
>>>> 'Horde/Cache/one.php' for inclusion
>>>>            ^^^^^
>>>> (include_path='/usr/local/www/horde/lib:/usr/local/share/pear:.') in
>>>> /usr/local/www/horde/lib/Horde/Cache.php on line 174
>>>>
>>>> Fatal error: Call to undefined method PEAR_Error::get() in
>>>> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>>>>
>>>> What part of Horde is calling "Horde/Cache/one.php"? It does look
>>>> like this call is the one that misses the first character.
>>>>
>>>> PHP Fatal error:  Call to undefined method PEAR_Error::get() in
>>>> /usr/local/www/horde/lib/Horde/Perms/sql.php on line 270
>>>>
>>>
>>> Add a var_dump(debug_backtrace()); before that line Cache.php, to see
>>> where this driver name is coming from.
>>
>> This resulted in a lot of screen output when the error happened, but
>> there are no references to "emcache" in this output, only to the
>> correct "memcache".
>>
>> php log now contains two more lines:
>>
>> [14-Jul-2009 01:06:09] PHP Warning:  Cannot modify header information
>> - headers already sent by (output started at
>> /usr/local/www/horde/lib/Horde/Cache.php:174) in
>> /usr/local/www/horde/services/javascript.php on line 34
>>
>> [14-Jul-2009 01:06:09] PHP Warning:  Cannot modify header information
>> - headers already sent by (output started at
>> /usr/local/www/horde/lib/Horde/Cache.php:174) in
>> /usr/local/www/horde/services/javascript.php on line 35
>>
>
> The you have a badly broken PHP. There is no way a not-broken PHP could
> make "emache" from a "memcache" passed to Horde_Cache::factory().

Exactly what I suspected. Time to rebuild then.

Thanks,
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