util.pubsub: Ensure deleted node stays in memory store deletion failed This looks like a copy/paste fail. The in-memory representation could get out of sync if the storage failed to delete the node (it would report an error, but would no longer be listed until a server restart re-read it from storage).

return {
  _all = {
  },
  default = {
    ["exclude-tags"] = "mod_bosh,storage,SLOW";
  };
  bosh = {
    tags = "mod_bosh";
  };
  storage = {
    tags = "storage";
  };
}