What does "WSREP Aborter Idle" mean in a MariaDB Galera cluster?
After extensive searching the only reference I can find is a bug report filed with Codership. Within that report the following quote makes reference to the process and seems to point to this being both required and part of the normal operation of the Galera cluster.


  wsrep aborter thread is missing in the process list in node carthusian. Checking by gdb, shows that aborter thread is alive and working well.
  Also whole cluster is healthy and works good under sqlgen test load


If anyone has further details about this I'd be interested to learn more!