SpringBoot 整合 Dubbo 控制檯報日誌警告 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.

出現這樣的警告, 就是因爲相關的 jar 包中依賴有 log4j

1. 如果不配置 dubbo.application.logger 的話, Dubbo默認是使用 slf4j 

通過dubbo類org.apache.dubbo.common.logger.LoggerFactory, 就可以看出來

2. 打開 pom.xml 文件, 切換到 Dependency Hierarchy 標籤頁, 然後可以Filter檢索, 哪些 jar 包依賴 log4j, 然後在pom.xml文件中 exclusions 相應的

<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>