[Linux-cluster] DLM - Lock Value Block error

Patrick Caulfield pcaulfie at redhat.com
Mon Sep 10 07:44:28 UTC 2007

Christos Triantafillou wrote:
> Hi,
> I am using RHEL 4.5 and DLM 1.0.3 on a 4-node cluster.
> I noticed the following regarding the LVB:
> 1. there are two processes: one that sets the LVB of a resource while
> holding an EX lock
> and another one that has a NL lock on the same resource and is blocked
> on a dlm_lock_wait
> for getting a CR lock and reading the LVB.
> 2. when the first process is interrupted with control-C or killed, the
> second process gets
> an invalid LVB error.
> It seems that DLM falsely releases the resource after the first process
> is gone and then
> the second process reads an uninitialized LVB.
> Can you please confirm this error and create a bug report if necessary?

I don't know of this bug in particular, though it might be so. Can you raise a
bug and put as much information as possible into it please (example programs,
sample output, and contents of /proc/cluster/dlm_locks on the master node before
and after the incident).



More information about the Linux-cluster mailing list