Counter this issue from time to time

/Users/bob/nug-bi-pull/node_modules/mongodb/lib/utils.js:99
process.nextTick(function()

);
^
MongoError: Topology was destroyed
at nextFunction (/Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/cursor.js:544:25)
at Cursor.next [as _next] (/Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/cursor.js:696:3)
at nextObject (/Users/bob/nug-bi-pull/node_modules/mongodb/lib/cursor.js:672:8)
at Cursor.next (/Users/bob/nug-bi-pull/node_modules/mongodb/lib/cursor.js:262:12)
at /Users/bob/nug-bi-pull/index.js:155:18
at handleCallback (/Users/bob/nug-bi-pull/node_modules/mongodb/lib/utils.js:96:56)
at Collection.find (/Users/bob/nug-bi-pull/node_modules/mongodb/lib/collection.js:373:44)
at Query.callback (/Users/bob/nug-bi-pull/index.js:78:19)
at Query.handleReadyForQuery (/Users/bob/nug-bi-pull/node_modules/pg/lib/query.js:114:10)
at Connection.<anonymous> (/Users/bob/nug-bi-pull/node_modules/pg/lib/client.js:172:19)