zookeeper使用过程的错误

一、zookeeper启动成功，dubbo服务也注册成功，但是服务消费者调用失败

报错如下：

[myid:] - INFO [SyncThread:0:ZooKeeperServer@645] - Est
ablished session 0x16ae75366b60004 with negotiated timeout 40000 for client /127
.0.0.1:5094
2019-05-24 09:43:52,695 [myid:] - INFO [ProcessThread(sid:0 cport:2181)::PrepRe
questProcessor@651] - Got user-level KeeperException when processing sessionid:0
x16ae75366b60004 type:create cxid:0x4 zxid:0x3c09 txntype:-1 reqpath:n/a Error P
ath:/dubbo/sellergoods.service.BrandService/configurators Error:KeeperErrorCode
= NodeExists for /dubbo/sellergoods.service.BrandService/configurators

1、网上找了很多解决的方法：删除zookeeper配置的data和logs中的version2的数据。但是还是不行。

后来发现这个根本不是zookeeper的错误，而是代码的问题。着重检查两个地方。

一、pom.xml中jar包的问题，注意dubbo（阿里巴巴官方）和dubbox（当当网，一般叫做dubbo2.8.4）需要的依赖是不一样的。

下面是当当网的dubbox的引用。

 <!-- dubbo相关 -->

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>dubbo</artifactId>

            <version>2.8.</version>

        </dependency>

        <dependency>

            <groupId>org.apache.zookeeper</groupId>

            <artifactId>zookeeper</artifactId>

            <version>3.4.</version>

        </dependency>

        <dependency>

            <groupId>com.github.sgroschupf</groupId>

            <artifactId>zkclient</artifactId>

            <version>0.1</version>

        </dependency>

二、检查dubbo扫描的xml文件，写法是否有误。官方有参照。

provider

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd

        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <dubbo:protocol name="dubbo" port="20880"></dubbo:protocol>

    <!--<dubbo:protocol name="http" port="20881"></dubbo:protocol>-->

    <dubbo:application name="smallshop_goods_service" />

    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>

    <!--扫描包名-->

    <dubbo:annotation package="sellergoods.service.impl" />

</beans>

consumer

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd

        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <context:property-placeholder location="classpath:config/application.properties" />

    <mvc:annotation-driven>

      <mvc:message-converters register-defaults="true">

        <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">

          <property name="supportedMediaTypes" value="application/json"/>

          <property name="features">

            <array>

              <value>WriteMapNullValue</value>

              <value>WriteDateUseDateFormat</value>

            </array>

          </property>

        </bean>

      </mvc:message-converters>

    </mvc:annotation-driven>

    <!-- 引用dubbo 服务 -->

    <dubbo:application name="smallshop_manager_web" />

    <dubbo:registry address="zookeeper://127.0.0.1:2181" timeout="6000"/>

    <!--扫描包名-->

    <dubbo:annotation package="smallshop.manager.controller" />

</beans>

巴特西

zookeeper使用过程的错误

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