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Date: Tue, 26 Feb 2008 15:38:30 +0100
From: Rudy Gevaert <Rudy.Gevaert@UGent.be>
Organization: Universiteit Gent
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Subject: Re: [users@httpd] Flock issue? Further debug help needed

Joshua Slive wrote:
> On Tue, Feb 26, 2008 at 6:22 AM, Rudy Gevaert <Rudy.Gevaert@ugent.be> wrote:
>> Hello,
>>
>>  At our site we are running several Apache2 (Debian Etch) installations.
>>   These our mounting a NFS share (Netapp).  The Apache webservers are
>>  behind a Linux Virtual server setup.
>>
>>  Sometimes we see that one of the apache webservers is hung.  It still
>>  listens on port 80 but doesn't do anything with the incoming
>>  connections.  Only restarting apache fixes it.
>>
>>  When I do a strace on the apache processes I see:
>>  flock(14, LOCK_EX <unfinished ...>
>>
>>  Having a look at the that process its file descriptor:
>>
>>  tygra:/proc/14# ls -l /proc/18836/fd/14
>>  lrwx------ 1 root root 64 Feb 26 09:27 /proc/18836/fd/14 ->
>>  /icto/tmp/sess_0bbf26140aa44a83e3c5c11afc0ca1b1
> 
> Can you figure out what file this is pointing at?

It is a php session file.


> My guess would be nfs problems. Have you pointed LockFile at a local disk?

  Unfortunately we can't point the session to a local file. Otherwise we 
end up with users needing to relogin in case a webservers goes down.
I guess you mean the apache LockFile?  That is on a local file, LockFile 
/var/lock/apache2/accept.lock

Thanks in advance,

Rudy

-- 
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Rudy Gevaert          Rudy.Gevaert@UGent.be          tel:+32 9 264 4734
Directie ICT, afd. Infrastructuur ICT Department, Infrastructure office
Groep Systemen                    Systems group
Universiteit Gent                 Ghent University
Krijgslaan 281, gebouw S9, 9000 Gent, Belgie               www.UGent.be
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

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