dubbo+zookeeper微服务架构入门遇到的坑

1.入门使用的版本

【dubbo】2.6.11
【zookeeper】3.6.3

2.坑1

在运行provider案例时，确认关闭centos7 防火墙的前提下仍然报错Caused by: java.lang.IllegalStateException: Zookeeper is not connected yet!，
**解决办法：**重新到zookeeper官网下载了安装包

3.坑2

spring 容器初始化的过程中遇到如下报错：
1.严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.NoClassDefFoundError: org/apache/curator/RetryPolicy Caused by: java.lang.ClassNotFoundException: org.apache.curator.RetryPolicy
2.严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.NoClassDefFoundError: org/apache/curator/framework/api/CuratorWatcher Caused by: java.lang.ClassNotFoundException: org.apache.curator.framework.api.CuratorWatcher
解决办法：

    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-framework</artifactId>
        <version>5.1.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-recipes</artifactId>
        <version>5.1.0</version>
    </dependency>

Curator是NetFlix公司开源的一套Zookeeper客户端框架，dubbo2.6.0版本不需要引入该依赖，dubbo2.6.11则必须引入。