The error message means that DB Connect stops executing your database input after it has been executed once. This is default behavior for the "Dump" input method if you don't provide a schedule or an interval. Since you're seeing the error message, your input has already successfully been executed once and you should be able to see indexed data - if there have been results.
You can adjust the settings for the input and configure it to run on a regular basis by providing an interval (in seconds or a relative time expression) or a cron schedule.
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