log.error("Failed to register for witness notifications", error);
                return null;
            });

        } catch (Exception e) {
            log.error("Error registering for witness notifications", e);
        }
    }

    /**
     * Check if witness support is enabled
     *
     * @return true if witness is enabled
     */

* Fixes the panic that occurs in the federation controller manager when registering a GKE cluster to the federation. Fixes issue [#30790](https://github.com/kubernetes/kubernetes/pull/30790). ([#30940](https://github.com/kubernetes/kubernetes/pull/30940), [@madhusudancs](https://github.com/madhusudancs))