This setting must be either True or False.

action: delete_indices
description: "Delete selected indices"
  ignore_empty_list: True
- filtertype: ...

Depending on your indices, and how you’ve filtered them, an empty list may be presented to the action. This results in an error condition.

When the ignore_empty_list option is set to True, the action will exit with an INFO level log message indicating such. If ignore_empty_list is set to False, an ERROR level message will be logged, and Curator will exit with code 1.

The default value of this setting is False