Currently running (2) ASA 5550's in LAN failover configuration ASA ver 8.3(2) . Intermittently the firewall will failover. And it will do this several times with a half hour or so time frame. Error message in syslogs is:
%ASA-3-105010 which is "Block memory was depleted. This is a transient message and the adaptive security appliance should recover.
Recommended Action: Use the show blocks command to monitor the current block memory.
What could be causing this issue? Is there a fix for this issue?
As a best practice, yes all interfaces should have a standby IP address assigned. If you have 'logging standby' enabled, this would be enough to trigger the bug I mentioned before. I would suggest adding the standby IP address to the management interface and then monitoring to ensure the block depletion stops.
Hope that helps.