diff --git a/logger/rotater/global.go b/logger/rotater/global.go
index d9b6a85..9e3ec64 100644
--- a/logger/rotater/global.go
+++ b/logger/rotater/global.go
@@ -2,7 +2,7 @@ package rotater
 
 import (
 	"os"
-	"path"
+	"path/filepath"
 	"log"
 	"amuz.es/src/infra/goutils/logger"
 	"github.com/lestrrat-go/file-rotatelogs"
@@ -19,11 +19,12 @@ func NewLogWriter(FileName string, logDir string, options ...Option) (logger.Rot
 	default:
 		logpath := FileName
 		if logDir != "" {
-			logpath = path.Join(logDir, FileName)
+			logpath = filepath.Join(logDir, FileName)
 		}
+		logpath,_ = filepath.Abs(logpath)
 		log.Println(" Attention!! log writes to ", logpath)
 		options=append(options,rotatelogs.WithLinkName(logpath))
-		if logWriter, err := NewRotater(logpath+".%Y%M%D", options...); err != nil {
+		if logWriter, err := NewRotater(logpath+".%Y%m%d", options...); err != nil {
 			return nil, err
 		} else {
 			loggers.Store(logWriter)