Bug #94715 Error Code: 2013. Lost connection to MySQL server
Submitted: 20 Mar 10:38 Modified: 14 May 21:48
Reporter: Remington Kumar Email Updates:
Status: Unsupported Impact on me:
None 
Category:MySQL Workbench Severity:S3 (Non-critical)
Version:8.0.15 OS:Microsoft Windows (Microsoft Windows 7 Professional Service Pack 1)
Assigned to: CPU Architecture:Any
Tags: WBBugReporter

[20 Mar 10:38] Remington Kumar
Description:
getting connection lost issue from the workbench 

[INF][     SSH tunnel]: Existing SSH tunnel found, connecting
15:49:18 [ERR][SSHTunnelHandler]: Error during data transfer: unable to write, client disconnected
15:49:18 [ERR][SQL Editor Form]: Error Code: 2013. Lost connection to MySQL server during query
15:51:04 [INF][     SSH tunnel]: Existing SSH tunnel found, connecting
15:51:04 [ERR][SSHTunnelHandler]: Error during data transfer: unable to write, client disconnected
15:51:04 [ERR][SQL Editor Form]: Error Code: 2013. Lost connection to MySQL server during query
15:51:06 [INF][     SSH tunnel]: Existing SSH tunnel found, connecting
15:51:06 [ERR][SSHTunnelHandler]: Error during data transfer: unable to write, client disconnected
15:51:06 [ERR][SQL Editor Form]: Error Code: 2013. Lost connection to MySQL server during query
15:51:51 [INF][     SSH tunnel]: Existing SSH tunnel found, connecting
15:51:52 [INF][     SSH tunnel]: Existing SSH tunnel found, connecting
15:52:04 [ERR][SSHTunnelHandler]: Error during data transfer: unable to read, remote end disconnected
15:52:04 [ERR][SSHTunnelHandler]: Error during data transfer: unable to read, remote end disconnected
15:52:11 [INF][     SSH tunnel]: Existing SSH tunnel found, connecting
15:52:12 [INF][     SSH tunnel]: Existing SSH tunnel found, connecting

How to repeat:
connection values are increased most often getting 2013 error code
[14 May 21:48] Miguel Solorzano
Thank you for the bug report, Windows 7 isn't supported OS:
https://www.mysql.com/support/supportedplatforms/workbench.html

Check the log error of the server for problems there.