RHEL7: df and other commands hang on NFS client after NFS server reboot or loss of connection
Issue
NAS filer was rebooted after which the server cannot access the qtree and causing other simple commands to hang.
Like df, su , cd
On one server we were able to fix this situation by killing all processes accessing those nfs mounts and doing a umount -l
NFS client connection recovery deadlocks with XPRT_CONNECTING set but no socket
Environment
- Red Hat Enterprise Linux 7 (NFS client)
- kernel before 3.10.0-327.36.1.el7
- kernel before 3.10.0-229.42.1.el7
- NFS
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