直接关闭了主机, 导致mongo非异常退出, 再次启动时报错
old lock file: /data/mongo/mongo27017/db/mongod.lock. probably means unclean shutdown,
but there are no journal files to recover.
this is likely human error or filesystem corruption.
执行命令
mongod --dbpath /data/mongo/mongo27017/db --repair
就好了