Error “Internal Error – An Unexpected Error Occurred” and “Timeout Waiting for Idle Object” When Accessing a Published Workbook

Published: 16 Apr 2019
Last Modified Date: 21 Aug 2020


When attempting to load a workbook the following error occurs intermittently:

Unexpected Server Error: LogicException: Internal Error - An unexpected error occurred and the operation could not be completed.
Unexpected Server Error

The below error can be found in the server side logs:

Cannot get a connection, pool error Timeout waiting for idle object.
Could not open JPA EntityManager for transaction.


  • Tableau Server
  • Tableau Online


  • This behavior was related to a known issue (ID: 935920) and it has been fixed in Tableau Server 2019.3 and later versions.
  • For Tableau Online, the pooling size was too small on the pod and has been increased as of July 2019.
Did this article resolve the issue?