The transaction log for database 'database_name' is full due to 'XTP_CHECKPOINT'

I have a question about XTP_CHECKPOINT. I'm using SQL Server 2014. I have a database that is in SIMPLE recovery model mode. It is also being replicated. There are no open transactions. I've run DBCC OPENTRAN and it returns: > "No active open transactions." But I keep getting this message whenever I try to create or drop a table or delete data: (I've replaced my actual database name with the word database_name) >"The transaction log for database 'database_name' is full due to 'XTP_CHECKPOINT'" Does anyone know why this might be happening, and, more importantly, how can I make it stop? And yes, the database really is in SIMPLE recovery model mode. i.e. The transaction log should truncate automatically. Incidentally, another database that I have in full recovery mode did the same thing, started returning the same error: >The transaction log for database 'database_name' is full due to 'XTP_CHECKPOINT' I tried to change the log growth settings to unlimited growth, but it wouldn't let me, returning the same error. I can reproduce the problem without any XTP stuff at all, except for just the filegroup. Here's how: http://pastebin.com/jWSiEU9U