Jenkins部署Spring boot项目失败

一天踩两次坑也是醉了~更新完spring boot的版本后居然部署不成功！查看日志报以下错

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[FATAL] Non-resolvable parent POM for com.xxxx.xxxx:0.0.1-SNAPSHOT: Failure to transfer org.springframework.boot:spring-boot-starter-parent:pom:2.4.5 from [https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2) was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced.
Original error: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.4.5 from/to central ([https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2)): Connect to repo.maven.apache.org:443 [repo.maven.apache.org/151.101.40.215] failed: Connection timed out (Connection timed out) and 'parent.relativePath' points at no local POM @ line 5, column 10

    at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:383)
    at hudson.maven.MavenEmbedder.buildProjects(MavenEmbedder.java:370)
    at hudson.maven.MavenEmbedder.readProjects(MavenEmbedder.java:340)
    at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1327)
    at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1124)
    at hudson.FilePath.act(FilePath.java:1164)
    at hudson.FilePath.act(FilePath.java:1147)
    at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.parsePoms(MavenModuleSetBuild.java:985)
    at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:689)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:513)
    at hudson.model.Run.execute(Run.java:1907)
    at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:543)
    at hudson.model.ResourceController.execute(ResourceController.java:97)
    at hudson.model.Executor.run(Executor.java:429)</pre>

一开始以为是网络问题，还试了把jenkins更新，重装和更新jenkins的maven插件，升级maven，但后来发现都不是这些问题。
关键句是这个Failure to transfer org.springframework.boot:spring-boot-starter-parent:pom:2.4.5 from [https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2) was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced.
网上找到类似的解决方案：https://blog.51cto.com/qiangsh/1743074
于是直接跑到~/.m2/repository路径下把spring-boot-starter-parent目录全部删了~