Bug ID 615097: Incorrect use of HTTP::collect leads to TMM core.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,

Fixed In:

Opened: Sep 08, 2016

Severity: 2-Critical


Incorrect use of HTTP::collect leads to TMM hang. Watchdog kills TMM on timeout leading to core.


Traffic disrupted while tmm restarts.


If the iRule requests non-incremental HTTP::collect or amount greater than content-length when the whole-body has already been received, then this leads to TMM hang.


Add an HTTP::release after the HTTP::payload instruction; Or Use incremental HTTP::collect commands.

Fix Information

HTTP state machine was modified to handle non-incremental collects and condition where whole body has been received when the collect is issued.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips