冲突过程

异步对象序列化，对象里面如果有map，并且使用json.marshal to string,或者其他方式对map 执行了read、write操作。
而业务逻辑同步写对象map值，那么，就会触发: fatal error: concurrent map read and map write
本质原因在于：两个goroute对同一个map执行了读写并发，而golang map默认是不支持并发操作、没有加锁

冲突解决

(1)在主业务逻辑里面，提前把对象转为string，丢给异步任务去执行（不局限写log，可以是其他对map的操作）

(2)map 的读写加锁，而读写加锁对性能的影响，以及死锁等又带来新的麻烦。
关于优化并发map的可以参考这个分析，比较全面：https://misfra.me/optimizing-concurrent-map-access-in-go/

(3)主、异步任务交互参数改为string，或者对象的深clone，也就是完整的copy对象值，重造对象，而不是直接引用指针。

一个冲突实例的源码

读写map的行，都加以注释说明了。
补充说明：
(1)json.marshal 一个对象，如果对象里面有map，那么会触发对map的read操作

(2)seelog 在配置里面配置的是异步log，也就是写log的时候，加入异步队列，而代码里面也是传入对象的，从而这个对象是异步序列化，也就是异步map read操作

package main

import (
    "encoding/json"
    "fmt"
    seelog "github.com/cihub/seelog"
    "sync"
    "time"
)

//https://github.com/cihub/seelog/wiki/Logger-types
/* file seelog-main.xml
<seelog>  
    <outputs formatid="main">  
        <buffered size="10" flushperiod="1000">  
            <rollingfile type="date" filename="gologs/main.log" datepattern="2006.01.02" maxrolls="30"/>  
        </buffered>  
    </outputs>  
    <formats>  
        <format id="main" format="%Msg%n"/>  
    </formats>  
</seelog>  
*/

func main() {
    var logger, _ = seelog.LoggerFromConfigAsFile("conf/seelog-main.xml")
    seelog.ReplaceLogger(logger)
    defer seelog.Flush()
    seelog.Info("需要输入的日志")

    for i := 0; i < 40; i++ {
        //i := 0
        go workerSimlutor(i)
    }
    fmt.Printf("40 worker simlutor running....")
    time.Sleep(time.Duration(3) * 60 * time.Second)
    fmt.Printf("40 worker simlutor finish....")
}

func workerSimlutor(i int) {
    bmap := make(map[string]string)
    name := fmt.Sprintf("text_%d", i)

    ei := EventInfo{
        Name:           name,
        BusinessKey:    name,
        BusinessParams: bmap,
        lockBizParams:  &sync.RWMutex{},
    }

    for id := 0; id < 100; id++ {
        //strOut := ei.String() // 这里提前主动string，那么异步log 里面不会有map的read操作。
        seelog.Infof("i:%d,ei:%v", i, ei)// 这里是对象传入log，log里面 异步，异步marshal 对象，触发对对象里面map的read操作
    }

    for id := 0; id < 100; id++ {
        ei.SetVariable("num", fmt.Sprintf("%d", i)) // 这里更新map，触发write操作，
    }
}

type EventInfo struct {
    // 注册的 handler 的名称
    Name           string            `json:"name"`
    BusinessKey    string            `json:"businessKey"`
    BusinessParams map[string]string `json:"businessParams"`
    lockBizParams  *sync.RWMutex     `json:"-"`
}

func (ei *EventInfo) String() string {
    //ei.lockBizParams.Lock()
    //defer ei.lockBizParams.Unlock()  // 这里加锁能解决问题，不过复杂场景下，会导致死锁
    if b, err := json.Marshal(ei); err != nil {
        return fmt.Sprintf("%s", ei)
    } else {
        return fmt.Sprintf("%s", b)
    }
}

func (ei *EventInfo) SetVariable(key, val string) {
    ei.BusinessParams[key] = val
}

func (ei *EventInfo) GetVariable(key string) string {
    val, ok := ei.BusinessParams[key]
    if !ok {
        return ""
    }
    return val
}

冲突错误日志前半部分

40 worker simlutor running....fatal error: concurrent map read and map write

goroutine 8 [running]:
runtime.throw(0x64f48e, 0x21)

D:/AmiddleStability/Go1.7/go/src/runtime/panic.go:566 +0x9c fp=0xc0420276f0 sp=0xc0420276d0

runtime.mapaccess2(0x6079e0, 0xc042054f90, 0xc04213a540, 0xc0421608a0, 0xc04213a540)

D:/AmiddleStability/Go1.7/go/src/runtime/hashmap.go:340 +0x250 fp=0xc042027738 sp=0xc0420276f0

reflect.mapaccess(0x6079e0, 0xc042054f90, 0xc04213a540, 0xc042054f90)

D:/AmiddleStability/Go1.7/go/src/runtime/hashmap.go:1008 +0x46 fp=0xc042027770 sp=0xc042027738

reflect.Value.MapIndex(0x6079e0, 0xc042139f40, 0x95, 0x5f7080, 0xc04213a540, 0x98, 0x8, 0x200, 0xc042027870)

D:/AmiddleStability/Go1.7/go/src/reflect/value.go:1040 +0x12f fp=0xc0420277f8 sp=0xc042027770

fmt.(*pp).printValue(0xc04213c000, 0x6079e0, 0xc042139f40, 0x95, 0x76, 0x1)

D:/AmiddleStability/Go1.7/go/src/fmt/print.go:738 +0x1216 fp=0xc0420279e8 sp=0xc0420277f8

fmt.(*pp).printValue(0xc04213c000, 0x626640, 0xc042139f20, 0x99, 0x76, 0x0)

D:/AmiddleStability/Go1.7/go/src/fmt/print.go:764 +0x23a2 fp=0xc042027bd8 sp=0xc0420279e8

fmt.(*pp).printArg(0xc04213c000, 0x626640, 0xc042139f20, 0x76)

D:/AmiddleStability/Go1.7/go/src/fmt/print.go:668 +0x1fc fp=0xc042027cd0 sp=0xc042027bd8

fmt.(*pp).doPrintf(0xc04213c000, 0x6487a5, 0xa, 0xc04213e620, 0x2, 0x2)

D:/AmiddleStability/Go1.7/go/src/fmt/print.go:985 +0x1244 fp=0xc042027db8 sp=0xc042027cd0

fmt.Sprintf(0x6487a5, 0xa, 0xc04213e620, 0x2, 0x2, 0xc042027e58, 0x0)

D:/AmiddleStability/Go1.7/go/src/fmt/print.go:196 +0x71 fp=0xc042027e10 sp=0xc042027db8

github.com/cihub/seelog.(*logFormattedMessage).String(0xc042139f50, 0x664c02, 0x73b100)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/logger.go:369 +0x59 fp=0xc042027e58 sp=0xc042027e10

github.com/cihub/seelog.(*commonLogger).processLogMsg(0xc0420963f0, 0x61ef02, 0x736d00, 0xc042139f50, 0x73b100, 0xc042162a10)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/logger.go:312 +0xa3 fp=0xc042027ea0 sp=0xc042027e58

github.com/cihub/seelog.(*asyncLogger).processQueueElement(0xc0420963f0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclogger.go:115 +0x11f fp=0xc042027f40 sp=0xc042027ea0

github.com/cihub/seelog.(*asyncLoopLogger).processItem(0xc0420963f0, 0x0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:57 +0xf6 fp=0xc042027f68 sp=0xc042027f40

github.com/cihub/seelog.(*asyncLoopLogger).processQueue(0xc0420963f0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:63 +0x4b fp=0xc042027f88 sp=0xc042027f68

runtime.goexit()

D:/AmiddleStability/Go1.7/go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc042027f90 sp=0xc042027f88

created by github.com/cihub/seelog.NewAsyncLoopLogger

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:40 +0xa6

goroutine 1 [sleep]:
time.Sleep(0x29e8d60800)

D:/AmiddleStability/Go1.7/go/src/runtime/time.go:59 +0xef

main.main()

D:/AmiddleStability/godemo/test/rolllogseelog_concurrent_map.go:24 +0x18f

goroutine 5 [semacquire]:
sync.runtime_notifyListWait(0xc04200abd0, 0x0)

D:/AmiddleStability/Go1.7/go/src/runtime/sema.go:267 +0x130

sync.(*Cond).Wait(0xc04200abc0)

D:/AmiddleStability/Go1.7/go/src/sync/cond.go:57 +0x87

github.com/cihub/seelog.(*asyncLoopLogger).processItem(0xc0420961b0, 0x0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:50 +0xba

github.com/cihub/seelog.(*asyncLoopLogger).processQueue(0xc0420961b0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:63 +0x4b

created by github.com/cihub/seelog.NewAsyncLoopLogger

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:40 +0xa6

goroutine 6 [semacquire]:
sync.runtime_notifyListWait(0xc04200add0, 0x0)

D:/AmiddleStability/Go1.7/go/src/runtime/sema.go:267 +0x130

sync.(*Cond).Wait(0xc04200adc0)

D:/AmiddleStability/Go1.7/go/src/sync/cond.go:57 +0x87

github.com/cihub/seelog.(*asyncLoopLogger).processItem(0xc0420962d0, 0x0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:50 +0xba

github.com/cihub/seelog.(*asyncLoopLogger).processQueue(0xc0420962d0)

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:63 +0x4b

created by github.com/cihub/seelog.NewAsyncLoopLogger

D:/AmiddleStability/Go1.8/gopath/src/github.com/cihub/seelog/behavior_asynclooplogger.go:40 +0xa6