Bug ID 654996: Closed connections remains in memory

Last Modified: Sep 13, 2023

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

Known Affected Versions:
12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1, 12.1.3.6

Opened: Apr 03, 2017

Severity: 3-Major

Related Article: K50345236

Symptoms

A connection remains open, which results in memory leaks in the tmm for the connections. The following command shows connections on traffic that was already closed: tmsh show sys conn.

Impact

Memory increase due to connections left open. Incoming connections to the virtual server may fail and result in the BIG-IP sending a reset with a reset cause of "TCP closed".

Conditions

A ASM_RESPONSE_VIOLATION iRule on the ASM-enabled virtual server. A request with connection: close.

Workaround

If possible, remove this event from the iRule and/or add the OneConnect profile to the virtual server.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips