hadoop-2.7.1/tmp/dfs/namesecondary/in_use.lock (Permission denied) 错误解决
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hadoop-2.7.1/tmp/dfs/namesecondary/in_use.lock (Permission denied) 解决
在log文件中有错误java.io.FileNotFoundException: /home/hadoop/hadoop-2.7.1/tmp/dfs/namesecondary/in_use.lock (Permission denied)信息,查看 该文件时发现其用户组及用户均为root,由于在本例中安装hadoop系统均用的是用户hadoop,所以可以判断肯定曾经用root用户运行过hadoop启动程序,所以才产生了属于用户root 的in_use.lock文件,所以root用户运行命令 chown -R hadoop:hadoop in_use.lock,重新启动 start-all.sh,报错消失。
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