Hit Cursor not found while looping a large number of documents

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

);
^
MongoError: Cursor not found, cursor id: 88612636032
at Function.MongoError.create (/Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/error.js:31:11)
at /Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/connection/pool.js:483:72
at authenticateStragglers (/Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/connection/pool.js:429:16)
at Connection.messageHandler (/Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/connection/pool.js:463:5)
at Socket.<anonymous> (/Users/bob/nug-bi-pull/node_modules/mongodb-core/lib/connection/connection.js:309:22)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at TCP.onread (net.js:543:20)