Bug ID 648037: LB::reselect iRule on a virtual with the HTTP profile can cause a tmm crash

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 12.1.2

Fixed In:
13.1.0, 12.1.3, 11.6.5.1, 11.5.9

Opened: Feb 28, 2017

Severity: 2-Critical

Symptoms

tmm crashes after the LB::reselect iRule fails to connect to the server.

Impact

Traffic disrupted while tmm restarts.

Conditions

This issue can occur when a virtual server is configured with HTTP and the LB::reselect iRule. If the LB::reselect fails to connect to the server and there is not a monitor on the pool, tmm will crash.

Workaround

Configure a monitor for the pool.

Fix Information

Fixed a tmm crash related to LB::reselect

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips