Multipath -ll Fails With "/proc/sys/fs/nr_open" Error After Installing The DMMP 0.4.9 RPM Package (Doc ID 1646127.1)

Last updated on APRIL 23, 2014

Applies to:

Linux OS - Version 1.0.1 and later
Oracle VM - Version 2.2.2 and later
Linux x86-64

Symptoms

After updating the system, you get an errors when trying the multipath(8) command:

# /sbin/multipath -ll
Cannot open /proc/sys/fs/nr_open : No such file or directory

Changes

You have installed new RPM packages, either manually by installing a patch or by using yum(8). The device-mapper-multipath package was updated to version:

# /bin/rpm -q device-mapper-multipath
device-mapper-multipath-libs-0.4.9-46.0.5.el5

Cause

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