“Error resolving version for plugin 'org.apache.maven.plugins:maven-compiler-plugin' ”

这样一个错误，baidu怎么也没有答案，

[ERROR] Error resolving version for plugin 'org.apache.tomcat.maven:tomcat7-maven-plugin' from the repositories 
[local (/home/gitlab-runner/maven/repo), central (http://repo1.maven.org/maven2)]: 
Plugin not found in any plugin repository -> [Help 1]

最后从bing上搜索到相同情况并解决

How do you clear Apache Maven's cache?

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Have you tried the -U flag which will update artifacts

是说存在改变，cache需要更新，在命令行中增加 -U参数

sudo mvn clean package install -f park/pom.xml -DskipTests -U