RHEL7 Linux NFS4 server responds to RENEW with NFS4ERR_EXPIRED when lease is not expired but due to logging process reading /proc/net/rpc/auth.unix.gid/channel

Solution In Progress - Updated -

Issue

NFS client hung due to NFS server responding to RENEW with NFS4ERR_EXPIRED continuously.

Environment

  • Red Hat Enterprise Linux (NFS server)

    • kernel-3.10.0-514.16.1.el7.x86_64
    • nfs-utils-1.3.0-0.33.el7.x86_64
    • NFSv4.0
    • a root process reading /proc files including /proc/net/rpc/auth.unix.gid/channel

  • Red Hat Enterprise Linux (NFS client)

    • kernel-3.10.0-514.16.1.el7.x86_64
    • nfs-utils-1.3.0-0.33.el7.x86_64, util-linux-2.23.2-33.el7.x86_64
    • NFSv4.0

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