code: private boolean listenForDiscoveryMcRequests(Configuration pConfig) {
          // Check for system props, system env and agent config
          boolean sysProp = System.getProperty("jolokia." + ConfigKey.DISCOVERY_ENABLED.getKeyValue()) != null;
          boolean env     = System.getenv("JOLOKIA_DISCOVERY") != null;
          boolean config  = pConfig.getAsBoolean(ConfigKey.DISCOVERY_ENABLED);
          return sysProp || env || config;
      }
docs: For war agent needs to be switched on