Bug ID 997761: Subsessionlist entries leak if there is no RADIUS accounting agent in policy

Last Modified: May 29, 2024

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

Known Affected Versions:
15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2

Fixed In:
16.1.0, 15.1.5

Opened: Feb 26, 2021

Severity: 3-Major

Symptoms

Subsessionlist entries are not cleaned up when subsessions are deleted. For long-lived main sessions, use cases such as API protection, the number of leaked subsessionlist entries increases over time, resulting in increasing memory consumption. If high availability (HA) is configured, the standby device can experience even more memory pressure when a very large number of subsessionlist entries are sent to it for mirroring.

Impact

TMM may run out of memory and restart. Traffic disrupted while tmm restarts.

Conditions

This issue occurs if the main session is long-lived and there is no RADIUS accounting agent in the policy.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips