zookeeper not connected

问题环境：

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com</groupId>
    <artifactId>springboot-dubbo-provider-ticket</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-dubbo-provider-ticket</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <dubbo.version>2.7.8</dubbo.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- Dubbo Spring Boot Starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.8</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.101tec/zkclient -->
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.11</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.13.0</version>
        </dependency>
    </dependencies>

解决办法：application.properties 加上

dubbo.config-center.timeout=10000
dubbo.metadata-report.timeout=10000
dubbo.registry.timeout=10000