Pool execute won't release connection

I have setup a pool like this:

pool = mysql.createPool({
  //host, port,etc...
  waitForConnections: false,
  queueLimit: 1,
  debug: false,
  namedPlaceholders: true,
  supportBigNumbers: true
});

I then try to run queries with pool.execute, which I assume should close connections automatically as query does according to docs:

pool.query(function(err, conn) {
   conn.query(/* ... */);
   // Connection is automatically released when query resolves
})

However, it seems that the connections are left in sleep state (visible from information_schema.processlist) and once the connection limit (default 10) is reached, my code stops and waits until the database hits it’s timeout (100 seconds) and kills the dangling connections, then again the next 10 queries run and so on…

Am I missing something? The database is MariaDB 10.2.16

[sidorares]

looks like code in readme is incorrect, I’ll fix that

[PolymathWhiz]

Follow this and you should be good…

Link: https://github.com/sidorares/node-mysql2/issues/840#issuecomment-415228661