Bug ID 443139: Session data is unavailable during ACCESS_SESSION_CLOSED

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.0.0, 11.1.0, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0

Fixed In:
11.5.1, 11.5.0 HF1, 11.4.1 HF4, 11.3.0 HF9, 11.2.1 HF11

Opened: Jan 15, 2014
Severity: 3-Major
Related AskF5 Article:


An iRule that attempts to get session data in the ACCESS_SESSION_CLOSED event will always see empty values.


An iRule that depends on being able to manipulate session data during the ACCESSS_SESSION_CLOSED event will fail to find the data.


This issue was a side-effect of a fix to a different issue. This problem will occur for all iRules that attempt to get session data in the ACCESS_SESSION_CLOSED event.


There is no workaround available.

Fix Information

Session variables have been made available during the ACCESS_SESSION_CLOSED event. As a side effect, session variables are still available even after issuing the "ACCESS::session remove" command, because the actual removal is deferred until after the current iRule completes. However, it is considered an error to access that data outside of the ACCESS_SESSION_CLOSED event.

Behavior Change