How to fix nodejs mysql error: connection lost the server closed the System: Windows 10, Asking for help, clarification, or responding to other answers. Node-SQLite3. So each transaction flow needs an own connection. Once terminated, an existing connection object cannot be re-connected by design. The charset for the connection. Allow multiple mysql statements per query. I am having the following problem when trying to connect on purpose for testing into a server using an invalid username: events.js:187 throw er; // Unhandled 'er. Then, the solution was set it in 28800, that's 8 hours. Therefore in the following example error object is propagated to both pending callbacks : In this example, a fatal error is triggered by an invalid user. The code just keeps retrying to connect each time a "PROTOCOL_CONNECTION_LOST" event is triggered or the server is down. EADDRINUSEmeans that the port number whichlisten()tries READ MORE, Hii @kartik, They've fixed it. In the following example, only the first callback receives an error (wrong db name), the second query works as expected : You may lose the connection to a MySQL server due to network problems, the server timing you out, the server being restarted, or crashing. If you would like to close the connection and remove it from the pool, use connection.destroy() instead. This can be done like this: Please note a few things about the example above: Additionally you may be interested to know that it is currently not possible to stream individual row columns, they will always be buffered up entirely. object with ssl parameters or a string containing name of ssl profile. Thats when I realized that this is fantastic only while all systems are running. (Default: 10), The maximum number of connection requests the pool will queue before returning an error from getConnection. We are using mysql2 proxy example and see a fatal PROTOCOL_CONNECTION_LOST exception after several sql queries have successfully executed. If you configure the pool to allow up to 100 connections, but only ever use 5 simultaneously, only 5 connections will be made. Further debugging, i have realized that the same error is generated when not even running a sql query with the PHP example, indicating its a connection/auth issue: In an attempt to debug further, I have added some debug to server_handshake.js, specifically the readClientReply method: node-mysql2/lib/commands/server_handshake.js. Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower?