elasticsearch org.apache.logging.log4j jar包缺失

elasticsearch org.apache.logging.log4j jar包缺失

问题说明

elasticsearch 在java api中应用，jar包引用后，启动报错

maven依赖

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>x-pack-transport</artifactId>
    <version>5.3.3</version>
</dependency>
<dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>5.3.3</version>
</dependency>

启动

开始以为是log4j的jar包冲突，过滤掉其他jar中的log4j引用，依然报错，后来看了
elasticsearch客户端jar中的源码才发现是 elasticsearch引用jar的缺失

解决

本地项目中引入Apache的logging.log4j包即可

<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-api -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.11.1</version>
</dependency>