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NFS hang on UEK4 with failed lock transport (Doc ID 2338686.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version Oracle Linux 6.8 with Unbreakable Enterprise Kernel [4.1.12] and later
Information in this document applies to any platform.

Symptoms

Multiple NFS clients hang occasionally while doing ls or df -h. The issue occurs when client NFS parameters are at vers3 and tcp, the issue doesn't occur when using udp.

The error "failed to lock transport" is present.

Cause

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