finally figured out how to stop dask from erroring out. had to call client.close()

minerva/cluster.py

@@ -104,23 +104,3 @@ class Cluster:
 
         return security_group_id
 
-
-# Monkeypatch to address a known bug in Dask
-# https://github.com/dask/distributed/issues/4305
-from dask.distributed import Future
-import sys
-
-def monkeypatch_del(self):
-    try:
-        self.release()
-    except AttributeError:
-        # Occasionally we see this error when shutting down the client
-        # https://github.com/dask/distributed/issues/4305
-        if not sys.is_finalizing():
-            raise
-        #pass
-    except RuntimeError:  # closed event loop
-        pass
-
-Future.__del__ = monkeypatch_del
-