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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/07/24 18:44:02 UTC
[GitHub] [dubbo] JavaCodeWking opened a new issue, #10362: 混合使用注解和XML配置导致出现两个application实例（Mixing annotations and XML configuration results in two instances of application）
JavaCodeWking opened a new issue, #10362:
URL: https://github.com/apache/dubbo/issues/10362
### Environment
* Dubbo version: 2.7.16
* Operating System version: Window 10
* Java version: 1.8
### Steps to reproduce this issue
我并没有使用3.0以上版本，因为和其他的组件兼容性还不够好（I didn't use version 3.0 or above because the compatibility with other components was not good enough）
1. 我使用@EnableDubbo和@DubboReference注解注入我需要的Spring bean，dubbo的application 和registry信息使用XML 配置，并使用@ImportResource加载此XML配置（I inject Spring beans using @EnableDubbo and @DubboReference, the application and registry information is configured using XML, and I use @ImportResource to load this XML configuration）
2. 在运行项目后出现此错误（I got this error after running the project）：org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.apache.dubbo.config.ApplicationConfig' available: expected single matching bean but found 2: demo-consumer,org.apache.dubbo.config.ApplicationConfig#0
3. 出现了两个application实例（There are two application instances）
我给出实现上述错误的案例代码配置（I give the configuration of the case code that achieves the above error:）：
`@EnableDubbo
@SpringBootApplication
@ImportResource(value = "classpath:spring/dubbo-demo-consumer.xml")
public class ConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(ConsumerApplication.class, args);
}
}`
`<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://dubbo.apache.org/schema/dubbo
http://dubbo.apache.org/schema/dubbo/dubbo.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder/>
<dubbo:application name="demo-consumer"/>
<dubbo:registry address="127.0.0.1:2181"/>
</beans>`
`@RestController
public class TestController {
@DubboReference
private DemoService demoService;
}`
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[GitHub] [dubbo] chickenlj commented on issue #10362: 混合使用注解和XML配置导致出现两个application实例（Mixing annotations and XML configuration results in two instances of application）
Posted by GitBox <gi...@apache.org>.
chickenlj commented on issue #10362:
URL: https://github.com/apache/dubbo/issues/10362#issuecomment-1235010421
> 我并没有使用3.0以上版本，因为和其他的组件兼容性还不够好（I didn't use version 3.0 or above because the compatibility with other components was not good enough）
这个问题能具体描述一下吗？
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[GitHub] [dubbo] wangchengming666 commented on issue #10362: 混合使用注解和XML配置导致出现两个application实例（Mixing annotations and XML configuration results in two instances of application）
Posted by GitBox <gi...@apache.org>.
wangchengming666 commented on issue #10362:
URL: https://github.com/apache/dubbo/issues/10362#issuecomment-1197622818
可以尝试一下dubbo.config.mode，具体的值可以参考一下这个
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[GitHub] [dubbo] liufeiyu1002 commented on issue #10362: 混合使用注解和XML配置导致出现两个application实例（Mixing annotations and XML configuration results in two instances of application）
Posted by GitBox <gi...@apache.org>.
liufeiyu1002 commented on issue #10362:
URL: https://github.com/apache/dubbo/issues/10362#issuecomment-1193605162
1. @EnableDubbo 注解里默认会注入一个application， 你通过xml手动注入一个application 对象 导致容器中 会存在俩个application对象，且都没设置@Primary注解 导致从spring 中获取的时候不知道拿哪一个
2. 如果要使用@EnableDubbo 注解 即不需要配置xml，如果想使用dubbo注解和 xml 结合 则 不适用@EnableDubbo注解，在dubboxml中配置 <dubbo:annotation/>标签来支持注解
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