Hi Dan, > There's actually been quite a lot of discussion/work in this bug since > comment 2, so I don't > actually need that info anymore (except for reproduction steps, that's always > welcome).
Fair enough. I wish I had some reproduction steps but unfortunately it just happens randomly and not because of any one action. > Are you having any problems with the system *other* than just the log messages? Apologies here. I should have mentioned how it affects us. The symptoms seen are a number of docker commands that just hang indefinitely (e.g. docker ps, spinning up new containers). Occasionally, after a long time, we have seen it come back and continue working OK (like whatever was holding the lock released it finally), but most of the time it hangs indefinitely. On occasion we can also use the -n parameter (e.g. docker ps -n #) and it may or may not return a partial listing of running containers. We've also found (again, not always) that we might be able to stop a container if we use the container name or ID. When we strace the process, we just see: write(5, "GET /v1.24/containers/json?limit"..., 97) = 97 futex(0xc8200fa590, FUTEX_WAKE, 1) = 1 futex(0x21fce50, FUTEX_WAIT, 0, NULL ... and that's as far as it goes. I do have a Docker stacktrace if you want to see that. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1711407 Title: unregister_netdevice: waiting for lo to become free Status in linux package in Ubuntu: In Progress Status in linux source package in Trusty: In Progress Status in linux source package in Xenial: In Progress Status in linux source package in Zesty: Won't Fix Status in linux source package in Artful: In Progress Status in linux source package in Bionic: In Progress Bug description: This is a "continuation" of bug 1403152, as that bug has been marked "fix released" and recent reports of failure may (or may not) be a new bug. Any further reports of the problem should please be reported here instead of that bug. -- [Impact] When shutting down and starting containers the container network namespace may experience a dst reference counting leak which results in this message repeated in the logs: unregister_netdevice: waiting for lo to become free. Usage count = 1 This can cause issues when trying to create net network namespace and thus block a user from creating new containers. [Test Case] See comment 16, reproducer provided at https://github.com/fho/docker- samba-loop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1711407/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
