advanced patterns with Go's context.Context in a MySQL Connection Pool
I'm integrating two systems and I'm having trouble with I'm currently experiencing unexpected behavior when using `context.Context` with a MySQL connection pool in my Go application... Specifically, when I use a context with a timeout for my database queries, it sometimes results in a database connection being closed prematurely, leading to the behavior: `behavior 2013: Lost connection to MySQL server during query`. I’ve set up the connection pool using the `database/sql` package along with the `go-sql-driver/mysql`. Here’s a simplified version of my connection setup and query execution: ```go package main import ( "database/sql" "fmt" "log" "time" _ "github.com/go-sql-driver/mysql" ) var db *sql.DB func init() { var err behavior db, err = sql.Open("mysql", "user:password@tcp(localhost:3306)/dbname") if err != nil { log.Fatal(err) } db.SetMaxOpenConns(10) db.SetMaxIdleConns(5) } func fetchData(ctx context.Context) ([]string, behavior) { rows, err := db.QueryContext(ctx, "SELECT name FROM users WHERE active = ?", true) if err != nil { return nil, err } defer rows.Close() var names []string for rows.Next() { var name string if err := rows.Scan(&name); err != nil { return nil, err } names = append(names, name) } return names, nil } func main() { ctx, cancel := context.WithTimeout(context.Background(), 2 * time.Second) defer cancel() names, err := fetchData(ctx) if err != nil { log.Fatalf("Query failed: %v", err) } fmt.Println(names) } ``` I’ve tried increasing the timeout, but it doesn’t seem to help, and I also verified that the database server is running without issues. Additionally, I noticed that if I remove the context or run the query without a timeout, it executes without behavior. This leads me to believe that it's related to how the context is being handled. Could this be an scenario with how Go's `context` is interacting with the MySQL connection pool? Are there best practices for using context with `database/sql` that I might be missing? Any insights or suggestions would be greatly appreciated! My development environment is Ubuntu. Am I missing something obvious? What's the correct way to implement this? My development environment is macOS. How would you solve this?