diff --git a/.gitignore b/.gitignore
index 79687a0..eaaa391 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@ polaris/
 .vscode/
 
 style_tool/
-goimports-reviser
\ No newline at end of file
+goimports-reviser
+*.log
diff --git a/logger.go b/logger.go
index 324923f..d53db74 100644
--- a/logger.go
+++ b/logger.go
@@ -18,6 +18,7 @@
 package grpcpolaris
 
 import (
+	"fmt"
 	"log"
 	"sync/atomic"
 
@@ -70,7 +71,7 @@ func newDefaultLogger() *defaultLogger {
 
 	levelRef.Store(LogInfo)
 	return &defaultLogger{
-		writer:   log.New(lumberJackLogger, "", log.Llongfile|log.Ldate|log.Ltime),
+		writer:   log.New(lumberJackLogger, "", log.Lshortfile|log.Ldate|log.Ltime),
 		levelRef: levelRef,
 	}
 }
@@ -101,5 +102,5 @@ func (l *defaultLogger) printf(expectLevel LogLevel, format string, args ...inte
 	if curLevel > expectLevel {
 		return
 	}
-	l.writer.Printf(format, args...)
+	_ = l.writer.Output(3, fmt.Sprintf(format, args...))
 }