Does the parameter type of the setter match the return type of the getter?

JDK 1.8, dubbo-admin版本是2.5.4-SNAPSHOT，tomcat8.5啟動，報錯：

ERROR context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'uriBrokerService': Cannot create inner bean '(inner bean)' of type [com.alibaba.citrus.service.uribroker.impl.URIBrokerServiceImpl$URIBrokerInfo] while setting bean property 'brokers' with key [0]; nested excepti
on is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#25': Cannot create inner bean 'server' of type [com.alibaba.citrus.service.uribroker.uri.GenericURIBroker] while setting constructor argument; nested exception is org.springframework.beans.fact
ory.BeanCreationException: Error creating bean with name 'server': Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'URIType' of bean class [com.alibaba.citrus.service.uribroker.uri.GenericURIBroker]: Bean property 'URIType'
is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:230)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:122)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:287)

解決辦法：
　　1、webx的依賴改為3.1.6版；

<dependency>
    <groupId>com.alibaba.citrus</groupId>
    <artifactId>citrus-webx-all</artifactId>
    <version>3.1.6</version>
</dependency>

　　2、添加velocity的依賴，我用了1.7；

<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity</artifactId>
    <version>1.7</version>
</dependency>

　　3、對依賴項dubbo添加exclusion，避免引入舊spring　　

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>dubbo</artifactId>
    <version>${project.parent.version}</version>
    <exclusions>
        <exclusion>
            <groupId>org.springframework</groupId>
            <artifactId>spring</artifactId>
        </exclusion>
    </exclusions>
</dependency>

　　4、webx已有spring 3以上的依賴，因此注釋掉dubbo-admin里面的spring依賴

<!--<dependency>-->
    <!--<groupId>org.springframework</groupId>-->
    <!--<artifactId>spring</artifactId>-->
<!--</dependency>-->

　　確定war包解壓后lib目錄沒有spring 3 以下的依賴就行。然后運行正常了。

　　解決方式來源於：https://github.com/alibaba/dubbo/issues/50   stirp網友