This bug was fixed in the package ebtables - 2.0.10.4-3.5ubuntu1.17.04.1
--------------- ebtables (2.0.10.4-3.5ubuntu1.17.04.1) zesty; urgency=medium
* Use real locking in ebtables (LP: #1645324) - Prior use of locking by file exclusive access is inadequate because if ebtables crashes or is killed it will leave a stale lock file behind which then blocks new ebtables from running.
-- Dragan Stancevic <email address hidden> Tue, 18 Apr 2017 17:32:38 -0500
This bug was fixed in the package ebtables - 2.0.10. 4-3.5ubuntu1. 17.04.1
--------------- 4-3.5ubuntu1. 17.04.1) zesty; urgency=medium
ebtables (2.0.10.
* Use real locking in ebtables (LP: #1645324)
- Prior use of locking by file exclusive access is inadequate
because if ebtables crashes or is killed it will leave a
stale lock file behind which then blocks new ebtables from
running.
-- Dragan Stancevic <email address hidden> Tue, 18 Apr 2017 17:32:38 -0500