[PVFS-users] crash when no place left

[Rob Ross]

Hi,

Using the kpvfsd I find that the cp command doesn't seem to return, 
although I was able to ctrl-c the cp.  The mgr and iod are still up and 
running ok.  I was able, sort of, to unmount, but I cannot mount again; 
the mount.pvfs hangs waiting for soemthing or another.

That "md_stat: lstat: ..." message is normal, and I just took it out so we 
won't have to look at it in the future.

I'm going to try again with the user-space pvfsd and see if I can narrow 
down what is going on.  It appears that the iod and mgr are handling this 
just fine, and that there is simply a problem on the client side.

We're trying to get another prerelease out ASAP, so a fix for this may not 
make that cut.  I will try to get this fixed before the 1.6.3 release.

Thanks,

Rob

On Tue, 18 May 2004, Rob Ross wrote:

> Thanks for the problem report!  It is normal for the mgr to not log 
> anything in this case -- the mgr is not involved in write operations.
> 
> I'll see if I can replicate this here.
>
> On Tue, 18 May 2004 Stadrim.DRIM.CETMEF at i-carre.net wrote:
> 
> > I have 10 nodes running the iod server with 60 Go on each and one
> > other running the mgr server.
> > 
> > On a client (with pvfsd and the kernel module), if I try to copy a
> > file when all the servers are full, the cp command never returns. It is
> > impossible to kill this command (SIGKILL doesn't work), but killing
> > the mgr process works some time, in the worth case, I have to reboot
> > the client. I think that the kernel module waits for something that
> > never happens.
> > 
> > In the log files, I found that all the iod servers notice that there is
> > no place left on their local partition, but not the mgr or the pvfsd
> > on the client.
> > 
> > In the mgr log file, there is a lot of "md_stat: lstat:: No such file
> > or directory", nothing in the client's log.
> > 
> > Pvfs run on a Mandrake 9.0 with a custom kernel 2.4.26 and pvfs 1.6.2