I restarted the Secure Agent machine and now the status of the

advanced cluster

is Error.

The init script failed with the following standard error on some nodes in the

advanced cluster

:

Created symlink from /etc/systemd/system/apt-daily.service to /dev/null.
Created symlink from /etc/systemd/system/apt-daily-upgrade.service to /dev/null.
Removed symlink /etc/systemd/system/timers.target.wants/apt-daily.timer.
Removed symlink /etc/systemd/system/timers.target.wants/apt-daily-upgrade.timer.
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

#!/bin/sh

while(sudo lsof /var/lib/dpkg/lock-frontend)
do
echo "Sleeping 10s"
sleep 10
done

sudo apt-get -y update
sudo apt-get install -y expect