This stack trace is similar to one in https://github.com/zfsonlinux/zfs/issues/2934 - the suspected issue is that one of the devices is taking a long time to complete and ZFS is blocked waiting for this.
I suggest installing sysstat sudo apt install sysstat and when the lockup happens run: iostat -mx so that we can see if it is a long device delay or not. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1654517 Title: ZFS I/O hangs for minutes To manage notifications about this bug go to: https://bugs.launchpad.net/zfs/+bug/1654517/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
