diff --git a/pkg/common/trace_log/ctx.go b/pkg/common/trace_log/ctx.go
index 7e32a0db0..0909dfdc6 100644
--- a/pkg/common/trace_log/ctx.go
+++ b/pkg/common/trace_log/ctx.go
@@ -180,11 +180,12 @@ func SetContextInfo(ctx context.Context, funcName string, logLevel logrus.Level,
 	funcInfo.Err = err
 	funcInfo.LogLevel = logLevel
 	_, file, line, _ := runtime.Caller(0)
+	var s string
 	i := strings.SplitAfter(file, "/")
 	if len(i) > 3 {
 		file = i[len(i)-3] + i[len(i)-2] + i[len(i)-1] + ":" + utils.IntToString(line)
 	}
-	funcInfo.File = file
+	funcInfo.File = s
 	*t.Funcs = append(*t.Funcs, funcInfo)
 }