I've been trying to setup my test server since 1.12 pre-release came out and what happens is, I start it up and it crashes and shutdowns after unloading all the plugins.  There doesn't appear to be any fault tolerance on server startups with plugins being loaded that don't support the current build/release.  For example, the 1.12 changed a number of things that requires some plugin owners to update them for this release (nothing new unfortunately, that's a separate topic).  However, I urge the developers to build in some tolerance to plugins that fail to load up.  If they don't load, they shouldn't force the server to shutdown.  It should be able to remain up to allow us to test.  As it stands currently, the following don't work with 1.12 (Dynmap v2.4, WorldEdit v6.1.5, PlaceholderAPI v2.7.1, FeatherBoard v3, Multiverse-Portals v2.5.0, Jobs 3.8.1 and Residence v4.6.3.1 due to Dynmap).  Isn't the code setup to just disable the plugin that threw an exception during the load?  I've attached the latest.log file showing the startup and shutdown because of it.