Every time I run the dashboard this message appears and then splunk server goes down. Dashboard is based in a post-process search where the base searches are as scheduled reports. Why does this happens?
You need to make sure that the TTL ("Time To Live") of your scheduled search is at least as long as the periodicity of the search. If your search runs every day than the search's TTL should be at least 60*60*24 or greater. If not, you will get this error. You can check TTL like this: