spark — 集羣errors

namenode一直處於安全模式

查看日誌發現：
Resources are low on NN. Please add or free up more resources then turn off safe mode manually
解決思路：查看文件系統磁盤空間使用情況: /home目錄已經使用完
修改 core-site.xml的hadoop.tmp.dir值

df - report file system disk space usage
-h, --human-readable   -> print sizes in human readable format (e.g., 1K 234M 2G)
-l, --local            -> limit listing to local file systems