Add missing 404 guard

internal/controllers/reconciliation/controller.go

@@ -23,8 +23,6 @@ import (
 	"github.com/go-logr/logr"
 )
 
-// TODO: There's a 404 missing exclude somewhere
-
 // TODO: Block ResourceSlice deletion until resources have been cleaned up
 // TODO: Clean up unused resource slices older than a duration
 
@@ -63,7 +61,7 @@ func (c *Controller) Reconcile(ctx context.Context, req *reconstitution.Request)
 	comp := &apiv1.Composition{}
 	err := c.client.Get(ctx, req.Composition, comp)
 	if err != nil {
-		return ctrl.Result{}, fmt.Errorf("getting composition: %w", err)
+		return ctrl.Result{}, client.IgnoreNotFound(fmt.Errorf("getting composition: %w", err))
 	}
 
 	if comp.Status.CurrentState == nil {
@@ -78,6 +76,7 @@ func (c *Controller) Reconcile(ctx context.Context, req *reconstitution.Request)
 	if !exists {
 		// It's possible for the cache to be empty because a manifest for this resource no longer exists at the requested composition generation.
 		// Dropping the work item is safe since filling the new version will generate a new queue message.
+		logger.V(1).Info("dropping work item because the corresponding manifest generation no longer exists in the cache")
 		return ctrl.Result{}, nil
 	}