Dubbo学习笔记

1.zookeeper连接失败

1. 检查服务器的zookeeper端口是否开放，默认为2181

2. 检查zookeeper是否运行成功

# 进入bin文件夹
cd /usr/local/zookeeper/bin
# 重启
zkServer.sh restart
# 查看状态
zkServer.sh status
# 使用客户端进行连接
zkCli.sh
# 根据zookeeper.out排错

3. 目前dubbo使用curator4.X作为zookeeper的客户端，但curator4.X不支持3.4.X 只支持3.5.X

修改pom.xml

<dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>${dubbo.version}</version>
            <type>pom</type>
            <!-- 4.0.0原生不兼容zk 3.4, 必须进行兼容性处理 -->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.8</version>
        </dependency>