<type>pom</type>

The maven central repository finds the dependency of zookeeper. I introduce
<!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
<dependency>
<groupId>org.apache.zookeeper< in the maven file /groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.6</version>
<type>pom</type>
</dependency>

I found that the related jar package has not been downloaded, what is going on?