Bug ID 759638: APM current active and established session counts out of sync after failover

Last Modified: Oct 16, 2023

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:, 13.1.1,,,,

Fixed In:
15.1.0, 13.1.3

Opened: Feb 26, 2019

Severity: 3-Major


The 'tmsh show apm license' command shows that the current established session count is much larger than the current active session count. In the extreme case, current established session count can reach the maximum allowed, and the system reports the ERR_TOOBIG error in the apm log. err tmm3[12351]: 01490581:3: (null):Common:00000000: Access stats encountered error: SessionDB operation failed (key: tmm.license.global_estab_stats.f26de3c7, ret: ERR_TOOBIG).


There is no impact to user sessions. Only the connection counts are impacted.


This counter out-of-sync period happens right after failover and lasts for five minutes.



Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips