[imp] IMP5 hangs opening messages with multiple pdf attachments

[Michael M Slusarz]

Quoting Peter Woit <woit at math.columbia.edu>:

> On 03/21/2012 07:09 PM, Peter Woit wrote:
>> We've been using Horde/Imp for years, recently installed Horde4/Imp5.
>> Everything seems to work fine (traditional, not dynamic interface),
>> except for one major problem: when a user tries to open certain e-mail
>> messages their session hangs, and they have to restart their browser.
>>
>> This is completely reproducible, the messages that cause the problem
>> seem to be ones with multiple pdf attachments.
>>
>> The problem leads to a lot of hung-up httpd processes, which when killed
>> give an error message to the log of
>>
>> zend_mm_heap corrupted
>>
>> Running apache with USE_ZEND_ALLOC=0 doesn't fix the problem, but just
>> causes that error message to not be there when the httpd is killed.
>>
>> Nothing unusual shows up in horde or apache logs.
>>
>> Perhaps the problem has to do with how IMP is handling pdf attachments,
>> but I don't see any way to change its behavior to test this.
>>
>> Any advice about what to try, or how to generate enough debugging info
>> for a useful bug report, would be appreciated.
>>
>> Peter Woit
>
> To follow up, in case anyone else is having this problem, I've found  
> that a work-around is to turn off image manipulation capabilities,  
> i.e.
>
> $conf['image']['driver'] = false
>
> I'm guessing the problem is with pdf thumbnail creation on our  
> system. The same problem could be generated by changing from the  
> image driver from the PECL imagick one to our Imagemagick  
> installation on the server (which seems otherwise fine). When this  
> is done, the problem again appears when opening an e-mail with  
> multiple image attachments.

Your ImageMagick installation (or more likely your PHP and/or  
imagemagick PECL extension) are broken.

michael

___________________________________
Michael Slusarz [slusarz at horde.org]