SpringBoot 整合 Dubbo 控制台报日志警告 log4j:WARN No appenders could be found for logger (org.apache.dubbo.c..

log4j:WARN No appenders could be found for logger (org.apache.dubbo.common.logger.LoggerFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

出现这样的警告, 就是因为相关的 jar 包中依赖有 log4j

1. 如果不配置 dubbo.application.logger 的话, Dubbo默认是使用 slf4j 

通过dubbo类org.apache.dubbo.common.logger.LoggerFactory, 就可以看出来

2. 打开 pom.xml 文件, 切换到 Dependency Hierarchy 标签页, 然后可以Filter检索, 哪些 jar 包依赖 log4j, 然后在pom.xml文件中 exclusions 相应的

<dependency>
	<groupId>org.apache.curator</groupId>
	<artifactId>curator-framework</artifactId>
	<exclusions>
		<exclusion>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
		</exclusion>
	</exclusions>
</dependency>

<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-serialization-fst</artifactId>
	<exclusions>
		<exclusion>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
		</exclusion>
	</exclusions>
</dependency>