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CONTROLLER TAKEOVER COMPLETE AUTOMATIC - Communication Error ALERT in new cluster configuration

  1. Last updated
    Mar 18, 2025
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Category:
aff-series
Specialty:
hw
Last Updated:
3/18/2025, 5:54:15 AM

Applies to

  • AFF A20
  • Initial cluster configuration / setup

Issue

  • Unexpected takeover event reported. Example:

HA Group Notification from node_name (CONTROLLER TAKEOVER COMPLETE AUTOMATIC - Communication Error) ALERT

  • From the partner node, the following alerts are mentioned: 
[node_name: statd: cf.takeover.disabled:alert]: HA mode, but takeover of partner is disabled due to reason : unsynchronized log.
with:
 
[node_name: ThreadHandlerun: cf.fsm.clam.reqPartnerShtdwn:alert]: CLAM requests graceful shutdown of the HA partner to initiate a takeover while NVLOG is out of sync. Cluster and HA connectivity is down.
...
[node_name: cf_main: cf.fsm.takeover.on.reboot:info]: Failover monitor: One node initiated automatic takeover after detecting that its partner node is rebooting.
...
[node_name: shutdown_thread0: ha.localNodeShutDown:notice]: Shutdown of the local node has been initiated with inhibit_takeover set to FALSE.
  • The node down is not able to boot into "Waiting for giveback..." status.
  • An unexpected unsupported cluster network switch (Switch documentation for ONTAP hardware systems) is detected, under the "::> system switch ethernet show
    " ONTAP CLI output, or the CSHM-SWITCH-CONFIG.XML AutoSupport section. Example:
Device Name          switch_name (aa:bb:cc:dd:ee:ff)                                                                    
IP Address           192.168.0.1                                                                                        
Model to display     OTHER                                                                                             
Switch Network       cluster-network                                                                                   
Software Version     switch_name_firmware...                                                                            
Reference Config File Version     NA                                                                                   
SNMP Version         SNMPv2c                                                                                            
...                                                                                                                     
Serial Number of the Device Unknown                                                                                     
...                                                                                                                     
  • The same device is detected as connected to the Cluster/HA physical ports for this platform: e4a and e4b.
 

 

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