Host goes "non operational" due to NFS 4.1 storage domain becoming inaccessible
Issue
-
Host goes
non operational
,non-operational
,NonOperational
. -
There are many zombie/defunct processes on this host. They are all
ioprocess
processes. -
A
dd
command is hung in NFS kernel code. -
The Storage Domain causing the
non operational
state is running NFS 4.1. -
There are hung tasks reported in the
messages
file.
Environment
- Red Hat Virtualization (RHV) 4.0, 4.1
- Red Hat Enterprise Linux 7.3, 7.4 hosts
- NFS 4.1 Storage Domain
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