{"index":{"_index":"fess_config.scheduled_job","_id":"ping_es"}}

                logger.error(() -> "Failed to flush " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))), e);
            }
        });

    }

    /**
     * Pings the search engine cluster to check connectivity and health.
     *
     * @return the ping response with cluster information
     * @throws SearchEngineClientException if the ping fails
     */