Recently we encountered issue with below error for all views. This impacted all business users in QA instance. We were not able to figure out what was the root cause. We have open case with Tableau as well. Even though, we were able to resolve issue but still would like to hear from anyone who had similar issue and know the root cause so that we can avoid going forward.
"An unexpected error occurred. If you continue to receive this error please contact your Tableau Server Administrator.
DataSourceException: Tableau Data Engine Error: 8: An error has occurred in IPC_Socket::Recv(buffer length=16) An existing connection was forcibly closed by the remote host