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Oracle ZFS Storage Appliance: Systems "hang" due to 'AKD threads running in the RT class' in 2013.1.x releases (Doc ID 2018298.1)

Last updated on JULY 31, 2018

Applies to:

Sun ZFS Storage 7320 - Version All Versions and later
Sun ZFS Storage 7420 - Version All Versions and later
Oracle ZFS Storage ZS3-2 - Version All Versions and later
Sun ZFS Storage 7120 - Version All Versions and later
Oracle ZFS Storage ZS3-4 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

ZFS Storage Appliances hang during certain workloads after upgrading to 2013.1.x versions.

By generating an NMI crashdump (see KM Doc 1173064.1) when the system is hanging, Oracle TSC will be able to do an analysis of the situation during the hang.

In this case, the crashdump will reveal a system almost completely out of 'free memory', and a big file sync pending.

 

 

Changes

 A recent upgrade to any 2013.1.x version

 

Cause

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