Bug ID 747065: PEM iRule burst of session ADDs leads to missing sessions

Last Modified: Sep 14, 2023

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

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,

Fixed In:

Opened: Oct 17, 2018

Severity: 3-Major


Some PEM sessions that were originally added, later disappear and cannot be added back.


Policies available in the missing session cannot be accessed.


-- Subscriber addition is done by iRule on UDP virtual servers. -- The sessions are added in a burst. -- A small fraction of such sessions cannot be added back after delete.


Add a delay of at least a few milliseconds between adding multiple session with same subscriber-id and IP address.

Fix Information

The release handles the issue that prevented the addition of the new subscriber. Now, even after the bursts of iRule additions, no re-additions fail.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips