Only complain about file closing if error is unexpected

operator/builtin/input/file/file.go

@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 	"sync"
 	"time"
 
@@ -153,7 +154,11 @@ func (f *InputOperator) poll(ctx context.Context) {
 
 	// Close all files
 	for _, reader := range readers {
-		reader.Close() // #nosec - don't complain if the file is already closed
+		if err := reader.Close(); err != nil {
+			if !strings.HasSuffix(err.Error(), "file already closed") {
+				f.Errorf("problem closing reader", "file", reader.file.Name())
+			}
+		}
 	}
 
 	f.saveCurrent(readers)