Once I attempt the url in browser it work however in my manufacturing enviroment it offers:
cURL error 7: Failed to connect with xyz.com port 60009: Timed out (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)

attempt {
                 Drupal::httpClient()->get('http://xyz/cache-clear/all');
            } catch (Exception $e) {
                //log the exception to watchdog.
                $message = 'One thing went fallacious to flush cache in job portal';
                Drupal::messenger()->deleteAll();
                Drupal::messenger()->addError(t($message));
                Drupal::logger('Flush-Cache')->error($e->getMessage());
            }

Please Assist.
Thanks