RHEL5: system crashed, hung task panic, believed deadlock between rpciod and rpc.idmapd while under memory pressure
Issue
- RHEL 5 system hang and it had to be hard rebooted.
- Hung tasks in the messages file indicate both rpciod and rpc.idmapd are blocked for more than 120 seconds.
Environment
- Red Hat Enterprise Linux 5
- all kernels up to RHEL5.9
- NFSv4 client
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