Bug ID 1326797: The Pool State of an offline pool with one or more user-disabled pool members depends on which pool member was marked down last by its monitor (non-deterministic behaviour)

Last Modified: Feb 14, 2024

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

Known Affected Versions:
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, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 17.0.0, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1

Opened: Aug 02, 2023

Severity: 4-Minor

Symptoms

When you have two or more pool members with one pool member being administratively disabled and the other(s) being enabled, and all pool members are marked down by their monitor, the pool status depends on which pool member was marked down last. Specifically: - the disabled pool member is marked down by the monitor last - pool is in "offline/disabled-by-parent" state - one of the enabled pool members are marked down by monitor last - pool is in "offline/enabled" state

Impact

When all the pool members are marked down by their monitors, the State of the pool depends on which pool member was last marked down by its monitor.

Conditions

- LTM pool configured with two or more pool members - One pool member administratively disabled and the other(s) enabled - All pool members marked down by their monitors

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips