Bug ID 494098: PAC file download mechanism race condition

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.2.0, 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 HF10, 11.5.1 HF11, 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, 11.5.2, 11.5.2 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3

Fixed In:
12.0.0, 11.6.0 HF4, 11.5.3, 11.4.1 HF9

Opened: Dec 03, 2014
Severity: 2-Critical
Related AskF5 Article:
K16857

Symptoms

PAC file download mechanism might encounter a race condition if /etc/hosts is patched with the static entry of the host that contains PAC file.

Impact

Proxy PAC file fails to download.

Conditions

The /etc/hosts is patched with the static entry of the host that contains PAC file.

Workaround

Add delay in proxy PAC file download to avoid race condition.

Fix Information

PAC file download mechanism now avoids a race condition if /etc/hosts is patched with the static entry of the host that contains PAC file.

Behavior Change