Async writes issue

issue.ipynb

var insertedRecords = 0;

var insertRecords = function(db){
    fs.createReadStream("./some_file.csv").pipe(converter);
    
    converter.on("record_parsed", function (jsonRecord) {
        try {
            mongoRecord = db.collection('some_collection')
                .update(
                    {"some_key": parsedRecord["some_key"]},
                    parsedRecord,
                    {upsert: true}
                );
        } catch (e) {
            console.error("Error with record: " + jsonRecord.some_key);
            console.error(e);
        }
        
        
        insertedRecords += 1;
        if (insertedRecords % 100 === 0) {
            console.log("Inserted " + insertedRecords);
        }
        
    });
    
    converter.on("end_parsed", function(jsonObject) {
        console.log("Finished parsing");
    });
};

try {
    insertRecords(db);
} catch (e) {
    console.error(e);
}