KNOWLEDGE BASE

Error: "Lost connection to MySQL server during query" When Refreshing a Data Source on Tableau Online


Published: 26 Jul 2017
Last Modified Date: 22 Apr 2019

Issue

When attempting to refresh a data source on Tableau Online, the following message occurs:

"[MySQL][ODBC 5.3(w) Driver][mysqld-5.6.27]Lost connection to MySQL server during query."

Environment

  • Tableau Online
  • MySQL

Cause

This behavior occurs due to an issue with the MySQL driver. Tableau is working to provide the MySQL development team with the necessary information to fix this issue.   

Additional Information

This issue typically occurs only with extracts greater than 10 million rows. 


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