fix: gateway Walk() implementation to list correct contents (#10131)

closes #10122

cmd/gateway-main.go

@@ -59,29 +59,32 @@ func (l *GatewayLocker) NewNSLock(ctx context.Context, bucket string, objects ..
 // Walk - implements common gateway level Walker, to walk on all objects recursively at a prefix
 func (l *GatewayLocker) Walk(ctx context.Context, bucket, prefix string, results chan<- ObjectInfo, opts ObjectOptions) error {
 	walk := func(ctx context.Context, bucket, prefix string, results chan<- ObjectInfo) error {
-		var marker string
-
+		go func() {
 			// Make sure the results channel is ready to be read when we're done.
 			defer close(results)
 
+			var marker string
+
 			for {
 				// set maxKeys to '0' to list maximum possible objects in single call.
 				loi, err := l.ObjectLayer.ListObjects(ctx, bucket, prefix, marker, "", 0)
 				if err != nil {
-				return err
+					logger.LogIf(ctx, err)
+					return
 				}
 				marker = loi.NextMarker
 				for _, obj := range loi.Objects {
 					select {
 					case results <- obj:
 					case <-ctx.Done():
-					return nil
+						return
 					}
 				}
 				if !loi.IsTruncated {
 					break
 				}
 			}
+		}()
 		return nil
 	}