[imp] Apache Random Segmentation Faults with IMP

[Jeremy Freeman]

Here's something I have discovered: Not sure if it will pertain to 
others however. If I compile PHP with --enable-debug AND _not_ using the 
included mysql libraries the problem seems manageable. By manageable I 
mean it STILL segfaults frequently, however the segfault does not cause 
the browser to display a "Page cannot be displayed" message. So the 
problem has become transparent to the users. I would venture to guess 
that the timing of the segfault has been adjusted slightly so it occurs 
after the page content is delievered to the browser.

--
Jeremy

Craig A Lewis wrote:
> Hello,
> 
> I have the same problem. I too have reported it to the imp 
> group. Whats slightly interesting is that we all have
> fairly different systems I think. Ours is solaris, and I 
> can't tell for sure about you guys, but we have ssl going
> between browser and apache as well as IMAPS between apache/php
> and the UW IMAP server daemon. What I can't figure out is why
> I am not getting the Seg faults from apache. I have looked
> carefully at my LogLevels, etc. but I just don't understand
> why I am not getting the Segfault error, because even the
> konqueror browser is reporting that the https daemon is 
> dying. I can excite the bug much more frequently. I can get
> the compose window, send mail sequence to fail 50-80% of
> the time. My latest theory was that there is an nfs lock
> problem of some sort, but best I can tell, all 'scratch'
> session files are in /tmp which is a local disk, and while
> the php root directory is nfs mounted, I 'think' that
> anywhere php writes a file is local. 
> 
> What would be good is if We could find someone
> that 'really' doesn't have this problem and see
> if/how our php.ini or httpd.conf files differ. 
> 
> a new error I got today that I hadn't seen before....
> 
> ===============================================================
> An error occured while loading 
> https://mail.math.unm.edu/horde/imp/redirect.php:
> 
> Found a cyclic link in 
> https://mail.math.unm.edu/horde/imp/login.php?url=/horde/imp/mailbox.php?Horde=52399a6644602fb7df5d4695ce8f698b
> 
> 
>  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> [_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_] 
> 
> Craig Lewis     505 277 6068      help@math.unm.edu
> UNIVERSITY OF NEW MEXICO MATHEMATICS AND STATISTICS
> COMPUTER SYSTEMS SUPPORT
> Humanities Building Office 415
> Albuquerque, NM 87131
> 
> On Mon, 12 Aug 2002, Jeremy Freeman wrote:
> 
> 
>>For some reason, my Apache is randomly segfaulting when I access IMP 
>>3.1. This causes the IE6 to display a "This Page cannot be displayed". 
>>It seems to happen in 1 out of 20 clicks. It doesn't seem to matter 
>>which browser I use.
>>
>>Does anyone have any ideas?
>>
>>--
>>Jeremy
>>
>>I use a self-signed SSL cert and everything goes over SSL.
>>
>>Apache error.log shows:
>>
>>[Mon Aug 12 10:33:42 2002] [notice] child pid 4994 exit signal 
>>Segmentation fault (11)
>>[Mon Aug 12 10:36:23 2002] [notice] child pid 4996 exit signal 
>>Segmentation fault (11)
>>[Mon Aug 12 10:59:43 2002] [notice] child pid 5511 exit signal 
>>Segmentation fault (11)
>>[Mon Aug 12 10:59:44 2002] [notice] child pid 5456 exit signal 
>>Segmentation fault (11)
>>[Mon Aug 12 10:59:48 2002] [notice] child pid 4993 exit signal 
>>Segmentation fault (11)
>>
>>I am Running:
>>
>>Apache/1.3.26 (Unix) with
>>PHP/4.2.2
>>mod_perl/1.27
>>mod_ssl/2.8.10 OpenSSL/0.9.6e
>>
>>PHP compiled with: './configure' '--with-mysql' 
>>'--with-apache=../apache_1.3.26/' '--enable-debug' '--with-gettext' 
>>'--with-imap=../imap-2002.RC2/' '--with-xml'
>>
>>All compiled in static.
>>
>>Kernel: Linux 2.2.19pre17
>>
>>GDB backtrace reveals:
>>
>>Program received signal SIGPIPE, Broken pipe.
>>0x2adb43e4 in write () from /lib/libc.so.6
>>(gdb) bt
>>#0  0x2adb43e4 in write () from /lib/libc.so.6
>>#1  0x2ac2836c in TXT_DB_version () from /usr/lib/libcrypto.so.0.9.6
>>#2  0x00000000 in ?? ()
>>(gdb)
>>
>>
>>-- 
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>>Frequently Asked Questions: http://horde.org/faq/
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>>
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