Bug ID 486514: tmm coredump seen with remote logging via TCP

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP All(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

Fixed In:
12.0.0, 11.5.1 HF6

Opened: Oct 23, 2014
Severity: 3-Major
Related AskF5 Article:
K16569

Symptoms

TMM crash and coredump while logging to remote logging server.

Impact

Traffic disrupted while tmm restarts.

Conditions

This can happen when logging for AFM or other modules is turned on and one of the log destinations is a remote logging server with log messages sent over TCP transport protocol. The crash specifically occurs when transport is TCP, and an error occurs attempting to connect to the remote logging server.

Workaround

Use UDP transport for the remote logging destination server.

Fix Information

Fixed the crash that occurred in the logging module when using TCP as the transport to a log destination server.

Behavior Change