Bug ID 534804: TMM may core with rate limiting enabled and service-down-action reselect on poolmembers

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8

Fixed In:
12.0.0, 11.6.1, 11.5.4

Opened: Jul 23, 2015
Severity: 2-Critical

Symptoms

TMM may produce a core file when calculating the rate limit in certain circumstances.

Impact

Traffic disrupted while tmm restarts.

Conditions

VIP/pool configuration contains: - Pool configured with + Action On Service Down is set to Reselect - Pool members configured with + Connection Rate Limit is set If all pool members go down, this can trigger the core

Workaround

Remove rate limit configuration.

Fix Information

TMM no longer cores in certain conditions with rate limiting and service-down-action reselect on poolmembers

Behavior Change