Bug ID 524756: APM Log is filled with errors about failing to add/delete session entry

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.4.0, 11.4.1, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,

Fixed In:
11.6.0 HF6, 11.5.3 HF2, 11.4.1 HF10

Opened: May 22, 2015

Severity: 4-Minor


APM log is filled with the following error when the issue occurs: May 21 16:34:16 BIG-IP4013mgmt err tmm2[20158]: 01490558:3: 00000000: Access stats encountered error: Failed to add/delete session entry (ERR_NOT_FOUND)


There is no functional impact. However, APM log may become useless if the volume of the error is big.


If a session times out before it completes policy evaluation, APM will still attempt to delete its marker from the established session namespace and, hence, results in ERR_NOT_FOUND error



Fix Information

Access Filter now skips session marker deletion if the timed-out session is not in established state.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips