意外的EOF和（go-sql-driver / mysql）数据包中的繁忙缓冲区

I am getting the unexpected EOF and busy buffer error in go-sql-driver/mysql despite after setting the SetConnMaxLifetime, SetMaxIdleConns and SetMaxOpenConns as suggested here. Can anyone tell me the proper solution of this issue nothing seems to work for me?

db, err := sql.Open("mysql", "USERNAME:PASSWORD@tcp(IP:PORT)/DB?charset=utf8")
checkErr(err)
db.SetConnMaxLifetime(time.Second * 5)
db.SetMaxIdleConns(0)
db.SetMaxOpenConns(151)

rows, err := db.Query("Select col1, col2, col3 from tbl")
checkErr(err)

for rows.Next() {
    var col1 string     
    var col2 int32
    var col3 uint64

    err = rows.Scan(&col1, &col2, &col3)
    checkErr(err)  
    Process(col1, col2, col3)

}

I setup a local MySQL database and ran your code:

package main

import (
    "database/sql"
    "fmt"
    "log"
    "time"

    _ "github.com/go-sql-driver/mysql"
)

func main() {
    db, err := sql.Open("mysql", "root@tcp(localhost)/test?charset=utf8")
    if err != nil {
        log.Fatalln(err)
    }

    db.SetConnMaxLifetime(time.Second * 5)
    db.SetMaxIdleConns(0)
    db.SetMaxOpenConns(151)

    rows, err := db.Query("SELECT col1, col2, col3 FROM tbl2")
    if err != nil {
        log.Fatalln(err)
    }

    for rows.Next() {
        var col1 string
        var col2 int32
        var col3 uint64

        err = rows.Scan(&col1, &col2, &col3)
        if err != nil {
            log.Fatalln(err)
        }

        fmt.Println(col1, col2, col3)
    }
}

..and it worked just fine for me. My CREATE TABLE statement looks like this:

CREATE TABLE `tbl2` (
`col1` varchar(25) DEFAULT NULL,
`col2` int(11) DEFAULT NULL,
`col3` bigint(20) unsigned DEFAULT NULL 
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

What does your table structure look like?

I found two ways for work arround the packets.go:36: unexpected EOF error, first way was changing driver to ziutek/mymysql driver, works ok and more or less with the same performance.

Second way, with the default driver, is to set db.SetMaxIdleConns(100) and db.SetMaxOpenConns(100), my mysql has max_connections to 151, so I thought that limit to 100 will be ok.

In addition, prepared statements has speeded up a lot, before they were slower than Db.Query, now are at least twice as fast. (Tested with 200k queries in 20 goroutines)

I think the problem could be in file buffer.go of driver go-sql-driver/mysql, in line: nn, err := b.nc.Read(b.buf[n:]), some kind of timeout.