RHEL6.2: NFSv4 client hangs and lot of process in D state, constant stream of NFS4ERR_EXPIRED (-10011) errors in tcpdump
Issue
- rhel6 nfs client hangs and lot of process in D state.
- tcpdump of hung nfs client shows constant stream of NFS4ERR_EXPIRED (-10011) errors.
- System while responsive would hang when access a file from a remote NFS share. We have several other hosts that access the same area remotely with no issues.
- A reboot is required to recover.
Environment
- Red Hat Enterprise Linux 6.2 or below
- kernel version before 2.6.32-279.el6
- NFSv4
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