Vertx BodyHandler stuck on big file

gistfile1.txt

 curl -XPOST -F "file=@BigFile" "http://localhost:8080/"
 
 # Tested with 20Mo file

Main.kt

import io.vertx.core.Vertx
import io.vertx.ext.web.Router
import io.vertx.ext.web.handler.BodyHandler


fun main(args: Array<String>) {
    val vertx = Vertx.vertx()

    val router = Router.router(vertx)
    
    router.route().handler(
        BodyHandler.create()
    )
    router.route().handler {
        val result = it.fileUploads().joinToString("\n") { upload ->
            "${upload.name()} : ${upload.size()}"
        }
        it.response().end(result)
    }
    
    vertx
        .createHttpServer()
        .requestHandler(router::accept)
        .listen(8080) { http ->
            if (http.succeeded()) {
                println("HTTP server started on port 8080")
            } else {
                http.cause().printStackTrace()
            }
        }
}