BornToRain

Now I also have this problem, why haven't fixed it.

io.vavr.collection.HashMap

thanks, vavr collection is ok.but Future have problem.  controller return io.vavr.concurrent.Future have error;  Future.toCompletableFuture() is ok;

ObjectMapper had registered VavrModule

spring-boot-starter-data-mongodb

> 你是什​​么意思`work verticle numbers`？单个工作程序顶点的实例数？ no, the number of worker verticle is not the number of worker verticle instances. ex: ```java // 1 worker verticle numbers vertx.deployVerticle(HelloVerticle.class, new DeployOptions().setWorker(true).setInstances(CPUS)); ```