The agent download manager takes care of downloading the files before the action starts. This is very robust and handles disconnects, restarts, etc. (there are client settings to change the download retry/fail behavior, but the defaults work for almost everyone).
If an agent launches an action and the system restarts, the agent will consider the line of the action completed and it won’t try to re-run the rest of the action after restart (this is for safety reasons because we don’t know if it is OK to restart the action in the middle). The action will report “Failed” (although the actual message depends on the success criteria for the action).
If the action is set to retry on failure, the agent will follow the retry behavior.
