Bug ID 515322: Intermittent TMM core when using DNS cache with forward zones

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.4.1, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5

Fixed In:
12.0.0, 11.6.0 HF6, 11.5.4 HF2, 11.4.1 HF10

Opened: Mar 30, 2015
Severity: 3-Major

Symptoms

TMM can intermittently crash when using the DNS cache resolver.

Impact

Traffic disrupted while tmm restarts.

Conditions

When a cache configuration is "removed" there are conditions where a refcount is not properly managed that would lead to memory being deleted before the last user is done with it.

Workaround

N/A

Fix Information

TMM will no longer intermittently core when using the DNS cache resolver.

Behavior Change