Bug ID 556380: mcpd can assert on active connection deletion

Last Modified: Apr 28, 2025

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

Known Affected Versions:
11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 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, 11.5.1 HF10, 11.5.1 HF11, 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, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4

Fixed In:
12.1.0, 11.6.1, 11.5.4 HF2

Opened: Nov 05, 2015

Severity: 2-Critical

Related Article: K13165903

Symptoms

When all of the peers in an HA / DSC configuration are removed, then it is possible for the connection tear down to result in an assert.

Impact

MCPD asserts and restarts.

Conditions

Removal of all peers while a connection is handling a transaction.

Workaround

No workaround is necessary. MCPD restarts.

Fix Information

Connection tear down checks for active connections and does not result in an assert when removing all peers while a connection is handling a transaction.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips