Comment 32 for bug 1674532

I'm still seeing this on Ubuntu 16.04 connecting to Amazon RDS as well.

Apache service reloads had temporarily resolved it, but I got a huge rash of these again across all of my servers during the Unattended installs again last night.

Start-Date: 2017-03-21 04:30:58
Commandline: /usr/bin/unattended-upgrade
Upgrade: libc6-dev:amd64 (2.23-0ubuntu3, 2.23-0ubuntu6), libc6:amd64 (2.23-0ubuntu3, 2.23-0ubuntu6), locales:amd64 (2.23-0ubuntu3, 2.23-0ubuntu6), libc-bin:amd64 (2.23-0ubuntu3, 2.23-0ubuntu6), libc-dev-bin:amd64 (2.23-0ubuntu3, 2.23-0ubuntu6), multiarch-support:amd64 (2.23-0ubuntu3, 2.23-0ubuntu6), libfreetype6:amd64 (2.6.1-0.1ubuntu2, 2.6.1-0.1ubuntu2.1)
End-Date: 2017-03-21 04:31:02

Start-Date: 2017-03-22 03:53:14
Commandline: /usr/bin/unattended-upgrade
Upgrade: libc6-dev:amd64 (2.23-0ubuntu6, 2.23-0ubuntu7), libc6:amd64 (2.23-0ubuntu6, 2.23-0ubuntu7), locales:amd64 (2.23-0ubuntu6, 2.23-0ubuntu7), libc-bin:amd64 (2.23-0ubuntu6, 2.23-0ubuntu7), libc-dev-bin:amd64 (2.23-0ubuntu6, 2.23-0ubuntu7), multiarch-support:amd64 (2.23-0ubuntu6, 2.23-0ubuntu7)
End-Date: 2017-03-22 03:53:18

I rebooted after the error cropped up and it worked for about 8 or 9 hours before it happened again on the same servers.