Error "java.lang.NullPointerException" Refreshing Embedded Extract

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Error "java.lang.NullPointerException" Refreshing Embedded Extract

Published: 16 Mar 2018
Last Modified Date: 19 Mar 2018

Issue

When you try to refresh an embedded extract in Tableau Server, the following error occurs:
java.lang.NullPointerException

More details can be found in the VizQL backgrounder logs:

VizQL error: <Timestamp> (Default,,,<SessionID>,:refresh_extracts,-) pool-21-thread-1 : ERROR com.tableausoftware.model.workgroup.service.VqlSessionService - The group with id: <ID> is no longer available and may have been deleted. This can result in a failed extract refresh if it was used as the thumbnail id.

Environment

Tableau Server 10.3.5, 10.5.2
Windows 2008 R2

Resolution

Validate that the "The user/group with id: <ID> is no longer available and may have been deleted. This can result in a failed extract refresh if it was used as the thumbnail id." error is present in the VizQL backgrounder logs.
Download the workbook.
Open the workbook in Tableau Desktop.
Republish the workbook.
Run the extract refresh again.