When using 'soft' with NFS4 no EIO is returned to userspace when the NFS server is not reachable

Solution Unverified - Updated 2018-08-29T09:33:23+00:00 -

Issue

On RHEL 6 when an NFS share is mounted from a client with the following mount options:

rw,sync,retrans=1,timeo=100,nfsvers=4

and the connectivity to the NFS server is killed EIO is never returned to the application. This works correctly when using NFSv3.

Red Hat Enterprise Linux 6 with kernel older than the 6.6 GA kernel (kernel-2.6.32-504.el6)

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