Bug ID 707147: High CPU consumed by asm_config_server_rpc_handler_async.pl

Last Modified: May 14, 2019

Bug Tracker

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

Known Affected Versions:
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, 12.1.2 HF1, 12.1.2 HF2, 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, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7

Fixed In:
14.0.0, 13.1.0.8, 12.1.3.6

Opened: Feb 18, 2018
Severity: 3-Major

Symptoms

During a period of heavy learning from Policy Builder, typically due to Collapse Common elements, the backlog of events can cause a process to consume high CPU.

Impact

A process may consume high CPU even after the high traffic period is finished.

Conditions

1) Automatic Policy Builder is enabled 2) An element is configured to "Always" learn new entities, and collapse common elements 3) An extended period of heavy learning due to traffic is enountered

Workaround

Kill asm_config_server.pl (This will not affect traffic) Optionally modify one of the following A) Learn "Always" to another mode B) Turn off Collapse common URLs C) Change from Automatic Learning to Manual

Fix Information

None

Behavior Change