Bug ID 606509: Incorrect process priority in vCMP guest results in low priority of the guest control-plane, which might cause high availability failover

Last Modified: Nov 22, 2018

Bug Tracker

Affected Product:  See more info
BIG-IP Install/Upgrade, vCMP(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2

Fixed In:
13.0.0, 12.1.1 HF2, 12.1.1 HF1, 12.1.1

Opened: Jul 22, 2016
Severity: 2-Critical
Related AskF5 Article:
K41494015

Symptoms

Incorrect process priority in vCMP guest results in low priority of the guest control-plane, which might cause high availability failover.

Impact

vCMP guests may experience control-plane issues (such as failures to send or receive network failover traffic in an HA-pair, causing a failover).

Conditions

This occurs when the following conditions are met: * vCMP provisioned. * vCMP hypervisor (host) running 12.1.0 * vCMP guest with 2 or more cores deployed and running 11.5.0 or greater. * vCMP guest has HT-Split enabled (tmsh list sys db scheduler.splitplanes.ltm).

Workaround

None

Fix Information

This release restores the process nice value of VCMP guest control-plane, so the vCMP guest no longer experiences potential frequent failovers.

Behavior Change