Bug ID 488581: The TMM process may restart and produce a core file when using the SSL::disable clientside iRule command within a HTTP_REQUEST event

Last Modified: Feb 13, 2019

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 12.0.0

Fixed In:
12.1.0, 12.0.0 HF1, 11.6.0 HF6

Opened: Nov 04, 2014
Severity: 3-Major
Related AskF5 Article:
K17539

Symptoms

The Traffic Management Microkernel (TMM) process may restart and produce a core file when using the SSL::disable client-side iRule command within an HTTP_REQUEST event. Symptoms As a result of this issue, you may encounter one or more of the following symptoms: The BIG-IP system fails over to another host in the device group. The BIG-IP system generates a TMM core file to the /shared/core directory. The BIG-IP system temporarily fails to process traffic.

Impact

Traffic disrupted while tmm restarts.

Conditions

This issue occurs when the following conditions are met: You have configured a virtual server that uses an iRule. The iRule contains the SSL::disable client-side iRule command within an HTTP_REQUEST event. The virtual server processes traffic that triggers the HTTP_REQUEST event while processing encrypted traffic.

Workaround

Do not put 'SSL::disable clientside' inside HTTP_REQUEST.

Fix Information

The Traffic Management Microkernel (TMM) process no longer restarts and produces a core file when using the SSL::disable client-side iRule command within an HTTP_REQUEST event.

Behavior Change