问题：
在linux服务器上使用maven编译war时报错：
16:41:35 [FATAL] Non-resolvable parent POM for ***: Failure to find *** in *** was cached in the local repository, resolution will not be reattempted until the update interval of nexus has elapsed or updates are forced @ ***...
解决：
在mvn命令中添加 -U 该参数能强制更新服务器上的仓库缓存