What would be the likely causes of large system hint partitions? Normally large partition warnings are for user defined tables which they are writing large partitions to. In this case, it appears C* is writing large partitions to the system.hints table. Gossip is not backed up.
version: C* 2.2.7 WARN [MemtableFlushWriter:134] 2016-09-16 04:27:39,220 BigTableWriter.java:184 - Writing large partition system/hints:7ce838aa-f30f-494a-8caa-d44d1440e48b (128181097 bytes) Thanks, Ezra