@Override
        public boolean ping(ClickHouseNode server, int timeout) {
            return client.get().ping(server, timeout);
        }
Repeats sending same request until success, timed out or running into a
different error.

@param sealedRequest non-null sealed request
@param exception     non-null exception to start with
@param timeout       timeout in milliseconds, zero or negative numbers means
                     no repeat
@return non-null response
@throws CompletionException when error occurred or timed out
clickhouse-client/src/main/java/com/clickhouse/client/ClickHouseClientBuilder.java