Bug ID 617858: bigd core when using Tcl monitors

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2

Fixed In:
13.0.0, 12.1.2 HF1, 11.6.1 HF2

Opened: Sep 20, 2016
Severity: 3-Major
Related AskF5 Article:


If a Tcl monitor encounters an error, it may exit with an assert which causes bigd to core.


bigd can core, which temporarily suspends monitoring while bigd restarts.


This can occur rarely when Tcl monitors are in use (specifically, SMTP, FTP, IMAP, POP3 monitors).



Fix Information

Now, when a Tcl monitor encounters an error, it no longer exits with an assert, so bigd no longer cores.

Behavior Change