Oracle ZFS Storage Appliance: Restart of the Appliance Kit Daemon (akd) May Panic a ZFS Cluster Node
Last updated on JULY 04, 2017
Applies to:
Oracle ZFS Storage ZS4-4 - Version All Versions to All Versions [Release All Releases]Oracle ZFS Storage ZS3-4 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-2 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7320 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)
Symptoms
An Oracle ZFSSA cluster has transitioned into a degraded state. In this particular issue, three things will be true.
- Node-A is reporting as the AKCS_OWNER
- Node-B is reporting as Unknown (disconnected or restarting)
- The cluster links are reporting as AKCIOS_TIMEDOUT
The reason for the degraded state may be known (for example, Node-B is turned off), or it may be unknown. You can see these cluster states from the CLI with the following commands.
Changes
This new watchdog feature was added to AK 8.6.0 (2013.05.06.6.0) (2013.1.6) cluster systems.
This feature is also present in AK 8.7.0, and will likely remain in future code releases.
Cause
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