Bug ID 664461: Replacing HTTP payload can cause tmm restart

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(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, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1,

Opened: May 12, 2017
Severity: 2-Critical
Related AskF5 Article:


Under certain conditions, using the [ HTTP::payload replace ... ] iRule can result in the tmm restarting.


Traffic disrupted while tmm restarts.


Occurs when server response is non-chunked, does not contain a Content-Length header, an iRule adds a Content-Length header and performs an HTTP::payload replace command where the length is shorter than the original body length.



Fix Information

The HTTP::payload replace command no longer causes tmm restarts under certain conditions.

Behavior Change