I have recently seen lots of “lost connection to MySQL server” messages during queries.
I am using shinxql , thread_pool on a sigle server. I think the issue may be due to load spikes.
The error is fired during a mysqli->query call
Is there a way to log information to get more details about what is happening ?
Query log does not show the queries that fail so it may be a communication issue of the MySQL protocol.
It could be related to mysqli, manticore server or MySQL (unlikely as it should not be involved) but it is hard at this stage to identify the culprit.