Symptoms
The tmm running on the Standby device is repeatedly killed by sod. There are number of SessionDB ERROR messages on the tmm log.
/var/log/tmm1:
notice session_ha_context_callback: SessionDB ERROR: received invalid or corrupt HA message; dropped message.
Impact
Tmm restarts on the standby device. If a failover occurs while the tmm is restarting, traffic is disrupted.
Conditions
-- BIG-IP configured for high availability (HA)
-- Mirroring enabled
-- APM enabled
-- Traffic is being passed on the active device
