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Random AP loses its connection to the controller until rebooted

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TitleRandom AP loses its connection to the controller until rebooted
Symptoms
Random AP looses its connection to the controller until rebooted, following message repeated in the AP log.
 
00256:ru_mgmt.c:904-rumgmt_detectTask()-Discovery thread is alive. TID=13326, PID=1115, STEP=6




 
Environment
  • IdentiFi wireless
  • Firmware 9.21.12
  • AP3805
Cause
Firmware bug
Resolution
Workaround:
  • Increase poll timeout  to a large value, eg 60 secs
  • Investigate network disruption
Resolution:
  • Upgrade to 9.21.15
  • Upgrade to 10.11.06
  • Upgrade to 10.21.02
Additional notes
The underlying cause of this issue is  exasperated by an unstable network connection between the AP and controller, resolving this instability may mitigate against this problem.

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