Error message - 2013 Lost connection to MySQL server during query

Can anyone tell me what this might mean?

Thanks

2013 Lost connection to MySQL server during query
in:
[SELECT project_version_major, project_version_minor FROM zen_project_version WHERE project_version_key = 'Zen-Cart Database']
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.
2006 MySQL server has gone away
in:
[select count(*) as total from zen_sessions where sesskey = *****************']
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

Warning: Unknown(): A session is active. You cannot change the session module's ini settings at this time. in Unknown on line 0

It means your MySQL server disconnected after Zen Cart had opened a connection in order to begin processing the page.

When/where are you encountering this?
How can you reproduce the error?
Who's your hosting company?
What's their tech support saying about it?

I was getting the same 2013 error. It seems to not happen anymore after un-checking the "Display transit time" box in the USPS shipping module config.

I went ahead and unchecked the "Display weight" too just in case that is causing delays also.

Let me know if this works for anybody else.