Bug ID 836237: ZRD process restarts observed due to stale files in /var/zrd/zrd-undo/ when UCS file is loaded or any modifications in wide IP configurations.

Last Modified: Feb 20, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP DNS(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, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 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, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.1.0

Opened: Oct 09, 2019
Severity: 3-Major

Symptoms

Due to stale files in /var/zrd/zrd-undo, UCS loading is failing. Stale files are causing differences in zone information between named.conf and /var/zrd/zrd-undo files which is leading to restart of the zrd process (the ZoneRunner daemon).

Impact

UCS configuration load fails, resulting in zrd restarts.

Conditions

-- Creating a wide IP with one or more aliases. -- Deleting the configurations along with the ZoneRunner file. -- Loading the UCS file.

Workaround

Note: Before loading the UCS file, remove stale files in /var/zrd/zrd-undo/: 1. Halt the zrd and named processes: bigstart stop zrd named 2. Delete the GTM wide IP: tmsh delete gtm wideip a all 3. Remove the stale zrd files: \rm /var/zrd/zrd-undo/* 4. Edit named.conf (vi /var/named/config/named.conf) and remove all the zones. 5. Remove the stale named files: \rm /var/named/config/namedb/db.* /var/named/config/dummy 6. Restart the zrd and named processes: bigstart start zrd named

Fix Information

None

Behavior Change