問題1：
運行起來不報錯，不過在Console沒有zookeeper的心跳信息，也就是說沒有配置上zookeeper，而出錯的原因是下面藍色這段解析不了
spring-dubbo-provider.xml
<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!-- 提供方應用信息，用於計算依賴 -->
<dubbo:application name="dubbo-service" />
<!-- 使用zookeeper注冊中心暴露服務地址：部署zookeeper控制台的電腦ip -->
<dubbo:registry address="zookeeper://127.0.0.1:2181" />
<!-- 用dubbo協議在20880端口暴露服務 host="192.168.3.53" -->
<dubbo:protocol name="dubbo" host="192.168.3.53" port="20883" />
<!-- 聲明需要暴露的服務接口，對應的具體實現類是自定義bean -->
<dubbo:service interface="com.zk1.service.IUserService"
ref="userService" />
<!-- 服務實現 -->
<bean id="userService" class="com.zk1.service.impl.UserServiceImpl" />
</beans>
解決方法：
把 dubbo-2.5.3.jar解壓，把解壓出來的dubbo.xsd 隨便你放一個地方，打開eclipse--》Preferences--》XML--》XML Catalog --》add --》File System 把剛才dubbo.xsd弄進來，再改一下Location下面的Keyhttp://code.alibabatech.com/schema/dubbo 改為 http://code.alibabatech.com/schema/dubbo/dubbo.xsd 然后保存
問題2：
2016-12-19 20:20:21 AbstractConfig:301 WARN - [DUBBO] keefer: keefer: unknown error, dubbo version: 2.5.3, current host: 127.0.0.1
java.net.UnknownHostException: keefer: keefer: unknown error
at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:299)
at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:281)
at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:242)
at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:143)
at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:109)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:163)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:136)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:381)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:335)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:855)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
解決方法：
在 spring-dubbo-provider.xml 文件里邊
<dubbo:protocol name="dubbo" port="20883" />改成下面這個，加上host地址（記着，本人用127.0.0.1測試無效）
<dubbo:protocol name="dubbo" host="192.168.3.53" port="20883" />
問題3：
嚴重: Exception sending context initialized event to listener instance of class org.springframework.web.util.Log4jConfigListener
java.lang.IllegalStateException: Web app root system property already set to different value: 'webapp.root' = [/home/keefer/JAVA/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/zk1service/] instead of [/home/keefer/JAVA/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/zk1client/] - Choose unique values for the 'webAppRootKey' context-param in your web.xml files!
at org.springframework.web.util.WebUtils.setWebAppRootSystemProperty(WebUtils.java:161)
at org.springframework.web.util.Log4jWebConfigurer.initLogging(Log4jWebConfigurer.java:119)
at org.springframework.web.util.Log4jConfigListener.contextInitialized(Log4jConfigListener.java:49)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
解決方法：
將web.xml文件里邊的spring監聽器
<listener>
<description>spring監聽器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
修改成
<listener>
<description>spring監聽器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
dubbo消費者這端不用log4j日志配置，去掉就好