Dubbo 2.7.7 when i start 10 reference，it cause overflow.

[vio-lin]

• I have searched the issues of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.7
• Operating System version: windows
• Java version: jdk8

Steps to reproduce this issue

1. find 10 server
2. create 10 client in XML:DubboReference
3. start client Applicaion

Pls. provide [GitHub address] to reproduce this issue.

Expected Behaviort

The Client will be started and run will.

Actual Behavior

It take too much time to start application.

private void prepareDubboConfigBeans() {
        beansOfTypeIncludingAncestors(applicationContext, ApplicationConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, ModuleConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, RegistryConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, ProtocolConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, MonitorConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, ProviderConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, ConsumerConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, ConfigCenterBean.class);
        beansOfTypeIncludingAncestors(applicationContext, MetadataReportConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, MetricsConfig.class);
        beansOfTypeIncludingAncestors(applicationContext, SslConfig.class);
    }

org.apache.dubbo.config.spring.ReferenceBean#prepareDubboConfigBeans

every ReferenceBean is a factoryBean，before It start it will
find all ApplicationConfig in SpringContext ，wich will init all factoryBean
then other ReferenceBean will be init and try to get applicationConfig again.
the application just stop

[vio-lin]

我们生产环境上有个用户的应用里面大概有30多个客户端。
升级版本之后直接会有个应用动不了。实际测试中大概大概在
10个客户端左右就会出现超长时间的加载时间。

[chickenlj]

请先分析堆栈或内存情况，排查可能的阻塞点

[chickenlj]

同时建议尝试升级到最近的2.7.x或3.x版本