Bug ID 607724: TMM may crash when in Fallback state.

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2

Fixed In:
13.0.0, 12.1.2

Opened: Jul 28, 2016
Severity: 2-Critical
Related Article:


There is a chance, when HTTP in Fallback mode, that the HTTP filter will send an Abort event to the TCP filter (causing tear down) prematurely while the Aborting that was triggered by the upper filter/proxy is occurring. TMM may crash when this happens.


Traffic disrupted while tmm restarts.


It is not known exactly what conditions trigger this, but it has been known to occur when issuing HTTP::respond in the LB_FAILED event in an iRule, and it has been seen only rarely.



Fix Information

Fixed a rarely occurring tmm crash that might be related to issuing HTTP::respond in the LB_FAILED event in an iRule.

Behavior Change