Bug ID 601056: TCP-Analytics, error message not using rate-limit mechanism can halt TMM

Last Modified: Jun 30, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP AVR(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:
12.1.2

Opened: Jun 23, 2016
Severity: 2-Critical

Symptoms

An error message is displayed when TCP-Analytics fails to save new data. This error message is not rate-limited, as all other TMM error messages are, so if the error situation is encountered very frequently, the message will be displayed only occasionally, and not for every error event. Since the error message is not rate-limited, hitting this error many times might eventually lead to TMM halt.

Impact

TMM can halt. Traffic disrupted while tmm restarts.

Conditions

-- TCP-Analytics is assigned to virtual server. -- The aggregation method of TCP Analytics causes a full table situation because of the distribution of the client IP addresses and subnets.

Workaround

Remove TCP-Analytics from virtual servers.

Fix Information

Error message is performed with rate-limiting mechanism.

Behavior Change