Bug ID 573611: Erroneous error message Access encountered error: ERR_NOT_FOUND may appear in APM logs

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2

Fixed In:
13.0.0, 12.1.2

Opened: Feb 13, 2016
Severity: 4-Minor


When a user session times out, then subsequently attempts access using the expired session ID, APM may log a log message at "err" level similar to this: Aug 15 14:54:25 bigip.hostname err tmm[10206]: 01490514:3: (null):Common:00000000: Access encountered error: ERR_NOT_FOUND. File: ../modules/hudfilter/access/access_session.c, Function: access_session_delete, Line:


Error log messages may be confusing to BIG-IP APM administrators. The client is able to successfully reconnect.


User is logged into APM and session times out.



Fix Information

Erroneous messages of "Access encountered error: ERR_NOT_FOUND" are no longer logged in the APM log.

Behavior Change