关于部署verticle的上下文问题的Vertx测试

Question

所以这有点偷偷摸摸的，它不是100%发生的，但情况是这样的：

我创建了一个JUnit集成类，声明了一个在上下文上运行的Rule，然后从规则中提取了vertx对象。然后我将新的verticle部署到vertx，如果尝试部署超过3-4个verticle，我会为每个verticle得到以下结果：

Jan 09, 2017 2:43:33 PM io.vertx.core.impl.ContextImpl
SEVERE: Unhandled exception
java.lang.IllegalStateException: Result is already complete: succeeded
    at io.vertx.core.impl.FutureImpl.checkComplete(FutureImpl.java:164)
    at io.vertx.core.impl.FutureImpl.complete(FutureImpl.java:108)
    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:135)
    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:23)
    at io.vertx.core.eventbus.impl.EventBusImpl.lambda$callCompletionHandlerAsync$2(EventBusImpl.java:340)
    at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:316)
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:418)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:440)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)
    at java.lang.Thread.run(Thread.java:745)

导致此问题的代码如下所示：

@RunWith(VertxUnitRunner.class)
public class VertxTest {

    @Rule
    public RunTestOnContext rule = new RunTestOnContext(Vertx::vertx);

    @Test
    public void testLinearExecution(TestContext context) {
        Vertx vertx = rule.vertx();
        vertx.deployVerticle(new AbstractVerticle() {
            @Override
            public void start() throws Exception {
                this.vertx.eventBus().consumer("bla", event -> {});
            }
        });
        vertx.deployVerticle(new AbstractVerticle() {
            @Override
            public void start() throws Exception {
                this.vertx.eventBus().consumer("bla", event -> {});
            }
        });
        vertx.deployVerticle(new AbstractVerticle() {
            @Override
            public void start() throws Exception {
                this.vertx.eventBus().consumer("bla", event -> {});
            }
        });
        vertx.deployVerticle(new AbstractVerticle() {
            @Override
            public void start() throws Exception {
                this.vertx.eventBus().consumer("bla", event -> {});
            }
        });
        vertx.deployVerticle(new AbstractVerticle() {
            @Override
            public void start() throws Exception {
                this.vertx.eventBus().consumer("bla", event -> {});
            }
        });
        vertx.deployVerticle(new AbstractVerticle() {
            @Override
            public void start() throws Exception {
                this.vertx.eventBus().consumer("bla", event -> {});
            }
        });
    }

}

这可能取决于运行它的机器，但我的猜测是，如果它不能重现，那么添加更多这样的人来使其更有可能：

vertx.deployVerticle(new AbstractVerticle() {
    @Override
    public void start() throws Exception {
        this.vertx.eventBus().consumer("bla", event -> {});
    }
});

另外值得一提的是，如果我用Vertx vertx = Vertx.vertx();更改了Vertx vertx = rule.vertx();，我会收到控制台的警告消息，但是问题就消失了。

那么，我做错了什么吗？这是一个问题吗？