diff --git a/controllers/DocumentController.go b/controllers/DocumentController.go
index 3dfe0249..ca9045b8 100644
--- a/controllers/DocumentController.go
+++ b/controllers/DocumentController.go
@@ -29,6 +29,7 @@ import (
 	"github.com/lifei6671/mindoc/utils/cryptil"
 	"fmt"
 	"github.com/lifei6671/mindoc/utils/filetil"
+	"github.com/lifei6671/mindoc/utils/gopool"
 )
 
 // DocumentController struct
@@ -882,7 +883,7 @@ func (c *DocumentController) Export() {
 		c.Abort("200")
 
 	}else if output == "pdf" || output == "epub" || output == "docx" || output == "mobi"{
-		if err := models.BackgroupConvert(c.CruSession.SessionID(),bookResult);err != nil {
+		if err := models.BackgroupConvert(c.CruSession.SessionID(),bookResult);err != nil && err != gopool.ErrHandlerIsExist{
 			c.ShowErrorPage(500,"导出失败，请查看系统日志")
 		}
 
diff --git a/models/BookResult.go b/models/BookResult.go
index d91c9ce1..9d11f423 100644
--- a/models/BookResult.go
+++ b/models/BookResult.go
@@ -224,7 +224,9 @@ func BackgroupConvert(sessionId string,bookResult *BookResult) error {
 	err := exportLimitWorkerChannel.LoadOrStore(bookResult.Identify, func() {
 		bookResult.Converter(sessionId)
 	})
+
 	if err != nil {
+
 		beego.Error("将导出任务加入任务队列失败 -> ",err)
 		return err
 	}
diff --git a/utils/gopool/gopool.go b/utils/gopool/gopool.go
index 1ff82a73..b7197471 100644
--- a/utils/gopool/gopool.go
+++ b/utils/gopool/gopool.go
@@ -6,8 +6,8 @@ import (
 	"fmt"
 )
 var (
-	HandlerIsExistErr = errors.New("指定的键已存在")
-	WorkerChanClosedErr = errors.New("队列已关闭")
+	ErrHandlerIsExist = errors.New("指定的键已存在")
+	ErrWorkerChanClosed = errors.New("队列已关闭")
 )
 type ChannelHandler func()
 
@@ -48,10 +48,10 @@ func NewChannelPool(maxWorkerNum, maxPoolNum int) (*ChannelPool) {
 
 func (pool *ChannelPool) LoadOrStore(key string,value ChannelHandler) error  {
 	if pool.isClosed {
-		return WorkerChanClosedErr
+		return ErrWorkerChanClosed
 	}
 	if _,loaded := pool.cache.LoadOrStore(key,false); loaded {
-		return HandlerIsExistErr
+		return ErrHandlerIsExist
 	}else{
 		pool.worker <- &entry{handler:value,key:key}
 		return  nil