private static MongoClient getInstance() {
try {
int port = RandomPortNumberGenerator.pickAvailableRandomEphemeralPortNumber();
IStreamProcessor output = new NullProcessor();
IRuntimeConfig runtimeConfig = new RuntimeConfigBuilder()
.defaults(Command.MongoD)
.processOutput(new ProcessOutput(output, output, output))
.build();
IMongodConfig mongodConfig = new MongodConfigBuilder()
.version(Version.Main.PRODUCTION)