pgxpool's config.AfterRelease is not firing - go

Question

I have the following code:
func (s *SqlServerDatabase) ConnectPool() {
config, err := pgxpool.ParseConfig(s.Url)
if err != nil {
fmt.Println("config Database Fail")
fmt.Print(err)
}
config.AfterRelease = func(conn *pgx.Conn) bool {
fmt.Println("After Releasing")
return true
}
config.BeforeAquire = func(ctx context.Context, conn *pgx.Conn) bool {
fmt.Println("Before Aquiring")
return true
}
conn, err := pgxpool.ConnectConfig(context.Background(), config)
s.PoolConn = conn
}
func (s *SqlServerDatabase) PoolQuery(query string) (pgx.Rows, error) {
conn, err := s.PoolConn.Acquire(context.Background())
if err != nil {
log.Printf("Couldn't get a connection with the database. Reason %v", err)
} else {
// release the connection to the pool after using it
defer conn.Release()
results, err := conn.Query(context.Background(), query)
if err != nil {
log.Printf("Couldn't execute query. Reason %v", err)
} else {
// show the results boy, you got it.
fmt.Printf("%T\n", results)
}
return results, err
}
return nil, err
}
So :
I create the connection in ConnectPool. thats where I set up the config and connect.
Then In my query method I acquire one of the pools the BeforeAcquire method fires and prints.
But the AfterRelease method never does.
I release the connection in the deferred call so I'm not sure why its not running.

Answer 1

See the code at pgxpool/conn.go l.30 :
/*20*/ func (c *Conn) Release() {
...
/*30*/ if conn.IsClosed() || conn.PgConn().IsBusy() ||
conn.PgConn().TxStatus() != 'I' ||
(now.Sub(res.CreationTime()) > c.p.maxConnLifetime) {
res.Destroy()
return
}
/* 'c.afterRelease' is checked and used only after that block */
So : under some conditions, the connection is detroyed right away, and AfterRelease is indeed never executed.
note: the code link reflects the state of the master branch on 2021-05-05.