It appears you're running Oracle Linux with Oracle's Unbreakable
Enterprise Kernel (UEK)  which is not compatible with RHEL's standard
kernel  nor is it the kernel that goes through the same level of testing
and compliance as a tier 1 operating system validation with the major
hardware vendors . I would suggest either rebooting into the standard
RHEL compatible kernel (it will be a 2.6.18 kernel), filing a ticket
with Oracle about the issue you're facing, or migrate back to real RHEL
On Thu, May 17, 2012 at 11:01:22AM -0500, Rhugga Harper wrote:
> We have a 2-node Oracle RAC that keeps getting the following error:
> kernel: nfs: RPC call returned error 88
> The storage being mounted is netapp. We don't see any errors/issues on the
> storage itself or the switches this client is connecting thru. The NFS
> network is a 2-interface ( 2 x 1Gb UTP) bond which shows no errors of any
> We are mounting with the following mount options:
> rw,noac,nointr,bg,hard,timeo=600,wsize=32768,rsize =32768,nfsvers=3,tcp
> This problem sometimes hits the OCR votedisk shares and causes the instance
> to crash.
> These systems were upgraded to 5.6 back in January.
> Currently running 2.6.32-300.4.1.
> Thanks for any info,
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