NFSv4 clients freeze under certain conditions -- RHEL/DataONTAP

[Steve Dickson]

Simon Vallet wrote:
> Hi,
> 
> yesterday we had to partially shut-down a Netapp cluster to remove some
> extra hardware. Normally, this should not cause any problems, as the
> other cluster member takes over the one that is shut down and the
> clients aren't supposed to see the difference.
> 
> However every single Linux client that was NFSv4-mounting a
> filesystem on the filer finally failed to the point we had to reboot 
> (hard-reset) it, as ls/df etc were unresponsive and probably froze 
> the entire system (no ssh access etc.)
> 
> from a RHEL AS4 -- kernel is rh-2.6.9-42 ; no idea which patches
> they included :
This will be fixed in the upcoming release of RHEL4....
See https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=194793

steved.