Scheduled Extract Refreshes Do Not Run As Expected, No Errors in Background Tasks for Extracts

Published: 07 Dec 2016
Last Modified Date: 13 Dec 2016


Scheduled extract refreshes intermittently fail to execute, and there is no corresponding error message in Background Tasks for Extracts.  

Additionally, the following entry will appear in the Tableau Server's backgrounder.log file: 
ERROR$LoggingErrorHandler - Unexpected error occurred in scheduled task. java.lang.IllegalArgumentException: No task type named AggregateAnalyticsTask


Tableau Server 9.2 and earlier


Upgrade to Tableau Server 9.3 or a newer version. For more information, see Upgrade Tableau Server


A backup taken from Tableau Server 9.3 or newer was restored to Tableau Server 9.2 or earlier, and Tableau Server is attempting to execute tasks that do not exist in Tableau Server 9.2 and earlier. 

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