I have just released rsyslog 3.18.4, a member of the v3-stable branch. This is a bugfixing release. It contains a number of fixes, most importantly one that could cause undesired message discarding when the queue is nearly full. This was caused by an invalid default enabling discard-on-queue-full when this was not explicitly configured. There are also other fixes. All users of the v3-stable branch are advised to update to this release.