[Gluster-users] Pending fcntl locks found!
freedman at FreeFormIT.com
Mon Mar 16 16:50:06 UTC 2009
At 04:06 AM 3/16/2009, Vikas Gorur wrote:
>2009/3/14 Keith Freedman <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 :) )
>Engineer - Z Research
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