We're seeing this on our build servers. These are VMWare virtual machines which run docker containers in privileged mode. Inside the containers are Jenkins agents and a build environment. Part of the build process uses unshare to create these namespaces: ipc uts mount pid net. If you have any questions about this arrangement, I can try to provide more detail and maybe example code.
The kernel is 4.4.0-79-generic x86_64. We are using docker 17.05.0-ce. In one case, the whole VM hung when this was encountered. Are there any workarounds for 16.04 users beyond rebooting the host? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1711407 Title: unregister_netdevice: waiting for lo to become free To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1711407/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
