[Magma] Too many open files (macos)

Using the current magma-preview repo I configured a two node cluster, added a 256MB magma bucket, and started pillow fight against the bucket.  After a bit of time (less than 1/2 hour) errors started occurring:

2020-01-30T13:36:55.689131-08:00 CRITICAL kvstore-13/rev-000000001/localIndex Error occured during memtable flush (Code(10): /Users/stevewatanabe/couchbase/ns_server/data/n_0/data/magmaBucket/magma.1/kvstore-13/rev-000000001/localIndex/sstable.143.data: Unable to open file err=Too many open files).

Doing some experiments to watch the file count grow I believe it is in the directory:

stevewatanabe @ ~/couchbase/ns_server/data/n_0/data/magmaBucket (magmaFixes) $ ls -lR | wc -l
2715

I did a cbcollect on node0: https://s3.amazonaws.com/cb-engineering/Steve+Watanabe/collectinfo-2020-01-30T213744-n_0%40127.0.0.1.zip

But this issue is very easy to reproduce.