Tasks Hung issue On NFS Volume In UEK1 (Doc ID 1672995.1)

Last updated on MARCH 26, 2017

Applies to:

Linux OS - Version Oracle Linux 5.8 with Unbreakable Enterprise Kernel [2.6.32] and later
Linux x86-64
Linux x86

Symptoms

There could be different reasons introduce the NFS server not responding issue, here we only describe one possibly scenario in which customer is running old UEK1 kernel.

Oracle Linux servers running some old version of UEK1 (2.6.32) get hung and system log shows many processes were sticking in D state.

The issue happens in an environment that application been deployed on NFS volumes.

The following are typical call trace outputs:

 

Cause

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