Ubuntu 14.04.1 LTS
Since installing unattended-upgrades, the following error message is received daily:
From root@xxxxx Thu Aug 28 06:36:06 2014 X-Original-To: root From: root@xxxxx (Cron Daemon) To: root@xxxxx Subject: Cron <root@xxxxx> test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily ) Content-Type: text/plain; charset=ANSI_X3.4-1968 X-Cron-Env: <SHELL=/bin/sh> X-Cron-Env: <PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin> X-Cron-Env: <HOME=/root> X-Cron-Env: <LOGNAME=root> Date: Thu, 28 Aug 2014 06:36:06 -0400 (EDT) /etc/cron.daily/apt: DB Update failed, database locked
The error message is NOT received on days where security updates are actually installed and an automatic reboot occurs.
What I would like to know please:
- Is this error message a "real problem" since security updates appear to be auto-installing as expected.
- Manually running the following commands occurs without error, so why is the (APT?) DB locked when run as a cron job? :
The same/similar issue is asked here but unfortunately with no solution: what can be causing /etc/cron.daily/apt to hang?