org.apache.hadoop.fs

Interface SafeMode

public interface SafeMode

Whether the given filesystem is in any status of safe mode.

Method Summary

Modifier and Type	Method and Description
default boolean	setSafeMode(SafeModeAction action) Enter, leave, or get safe mode.
boolean	setSafeMode(SafeModeAction action, boolean isChecked) Enter, leave, or get safe mode.

Method Detail

setSafeMode

default boolean setSafeMode(SafeModeAction action)
                     throws IOException

Enter, leave, or get safe mode.

Parameters:

action - One of SafeModeAction LEAVE, ENTER, GET, FORCE_EXIT.

Returns:

true if the action is successfully accepted, otherwise false means rejected.

Throws:

IOException - if set safe mode fails to proceed.

setSafeMode

boolean setSafeMode(SafeModeAction action,
                    boolean isChecked)
             throws IOException

Enter, leave, or get safe mode.

Parameters:

action - One of SafeModeAction LEAVE, ENTER, GET, FORCE_EXIT.

isChecked - If true check only for Active metadata node / NameNode's status, else check first metadata node / NameNode's status.

Returns:

true if the action is successfully accepted, otherwise false means rejected.

Throws:

IOException - if set safe mode fails to proceed.