[Gluster-users] Pending fcntl locks found!

[Keith Freedman]

alright.. I'll try to do that tonight and see if it solves the problem.

if I were able to identify the exact things that were causing this 
I'd pass them along, but right now I just have general ideas.
For example, squirrilmail webmail just breaks hard with RC4 (single 
server mode), whereas in RC2 it works.  At the same time, roundcube 
web mail works fine.  But still I have no way of knowing specifically 
where within squirrilmail it gets stuck so I can't identify a 
situation to debug.

Keith

At 06:07 AM 3/18/2009, you wrote:
>Hi.
>
>Try the split approach - I didn't notice this here on RC4, during my testing.
>
>Regards.
>
>2009/3/18 Keith Freedman 
><<mailto:freedman at freeformit.com>freedman at freeformit.com>
>I rolled back to RC2, and no longer have this problem.
>i don't see these error messages, and processes that were hanging 
>before are not hanging now?
>
>I'm using single process AFR.  should I split it out and try RC4, or 
>does it not seem logical that this should be a problem?
>
>Keith
>
>
>At 09:57 AM 3/16/2009, Keith Freedman wrote:
>Also, I'm wondering if this is related to the fact that I have 
>single process client/server.
>which used to be the recommended method and now is not.
>
>if I split those out, will that solve my problem?
>
>At 09:50 AM 3/16/2009, Keith Freedman wrote:
>At 04:06 AM 3/16/2009, Vikas Gorur wrote:
>2009/3/14 Keith Freedman 
><<mailto:freedman at freeformit.com>freedman at freeformit.com>:
> > all of a sudden, I'm getting messages such as this:
> >
> > 2009-03-13 23:14:06 C [posix.c:709:pl_forget] posix-locks-home1: Pending
> > fcntl locks found!
> >
> > and some processes are hanging waiting presumably for the locks?
> > any way to find out what files are being locked and unlock them.
> > restarting gluster doesn't seem to solve the problem.
>
>Are you using any applications that hold POSIX fcntl locks? Try
>running the server in debug mode --- then you can find out which files
>are being locked/not unlocked, etc.
>
>
>well, I'm sure I am, I've no idea really, there are some php scripts 
>which seem to hang and some python programs.
>
>however, this problem only manifested itself when I upgraded to rc4 
>and the new fuse-2.7.4glfs11
>
>so something must be significantly different about how those (or 
>that combination) handles locks.
>
>
>Also, debug mode wont really solve the problem, cause knowing what 
>exact file is the problem, isn't going to help because that wont 
>really tell me how to prevent this from happening.  Clearly one side 
>should get the lock and one should wait, rather than both servers in 
>the replicate pair just hanging on the same file?
>
>in addition, ERROR mode logging should log enough related 
>information to know this stuff (this is an enhancement request :) )
>
>
>Vikas
>--
>Engineer - Z Research
><http://gluster.com/>http://gluster.com/
>
>
>
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