I'm experiencing this issue too with artful on c5.large. During the installation of sssd-common 1.15.3-2ubuntu1, the last line of output is "Warning failed to create cache: usr.sbin.sssd" before the instance becomes unresponsive. If I use t2.medium, I don't experience this issue.
Regions tested: us-west-2 and eu-west-1 I do believe that I've experienced this issue without installing sssd, sometimes the machine fails to boot from the initial launch of the AMI. It freezes at "kernel: iscsi: registered transport (iser)" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1746806 Title: sssd appears to crash AWS c5 and m5 instances, cause 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1746806/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs