Bug ID 758099: TMM may crash in busy environment when handling HTTP responses

Last Modified: Sep 14, 2020

Bug Tracker

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

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7

Fixed In:
15.0.0

Opened: Feb 08, 2019
Severity: 3-Major

Symptoms

When load balancing HTTP requests, the BIG-IP system matches client-side and server-side connections. When connections are shutting down, a race condition may occur on a busy system and peer connection reference can be lost.

Impact

TMM crashes causing failover. Traffic disrupted while tmm restarts.

Conditions

-- The BIG-IP system has a standard virtual with HTTP profile and HTTP router. -- The BIG-IP system has high CPU utilization.

Workaround

None.

Fix Information

The race condition has been corrected, so TMM no longer crashes in a busy environment when handling HTTP responses.

Behavior Change