Splunk 7 upgrade - "ERROR DispatchThread - Failed to read runtime settings: File :/opt/splunk/var/run/splunk/dispatch/subsearch_***/runtime.csv does not exist"

Hi All, We just upgraded to Splunk 7 and a subsearch started auto-finalizing after 9000s timeout. Running this search by itself takes ~220s. Search.log shows a long list of (900s worth) entries of: ERROR DispatchThread - Failed to read runtime settings: File :/opt/splunk/var/run/splunk/dispatch/subsearch_tmp_###/runtime.csv does not exist I've seen plenty of old answers like this one https://answers.splunk.com/answers/104690/error-dispatchthread-error-reading-runtime-settings-file-does-not-exist-splunk-6-0-upgraded.html being a known issue in Splunk 6 and that it should be supressed. Curious if others are seeing this in Splunk 7 and if there is a better explanation of what is happening and how to resolve it.