Hadoop safemodeexception: XXXXXXX. Name node is in safe mode solution

As shown in, "Name node is in safe mode" is prompted during file copy ",

This indicates that hadoop's namenode is in safe mode,

The solution is to execute the command: hadoop dfsadmin-safemode leave

The dfsadmin command parameters are described as follows:

Hadoop dfsadmin-safemode Value

The parameter value is described as follows:

Enter-Enter security mode leave-force namenode to Exit security mode get- Return the information about whether to enable wait in security mode. Wait until the end of security mode.