踩坑：Failed to create a Maven project: ‘xxx/pom.xml’ already exists in VFS
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最近看hadoop，maven下载依赖包各种问题，无奈之下我只有频繁重新创建项目，不免有重名。
以上为背景。
根据错误提示，我琢磨着，应该把这个VFS里面的内容清理一下，因为毕竟我已经在文件中将project删除了。但是我不知道VFS是啥
遂上stackoverflow找方法，遇到一哥们，问题如下：
When I would like to re-create a maven project with a name had been but have been deleted already, I receive the following error message:
Failed to create maven project: ‘…/pom.xml’ already exists in VFS
下面靠谱回答：
See Cleaning System Cache page.
- Open any project in IntelliJ IDEA
- Select “File > Invalidate Caches / Restart …”
- Click on “Invalidate and Restart”
WARNING:
- Cleaning out the system caches, keep in mind that:
- It results in clearing the local history.
- To avoid losing data, check in the changes to your version control system before invalidating caches. Causes a complete rebuild of all the projects ever run in the current version of IntelliJ IDEA.
大体的意思是让我们清除缓存。还提醒我们在清缓存之前注意版本控制问题。
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删掉这个残缺不全的项目，然后 Invalidate and Restart 重新建立。OK