code: public int process() throws IOException, InterruptedException {
  		debug("ReplicationProcessor#process(): Processing start");
  
  		Properties gemfireProperties = PropertiesHelper.filterProperties(
  			System.getProperties(), "gemfire.");
  		String[] vmOptions = PropertiesHelper
  			.propertiesToVMOptions(gemfireProperties);
  
  		debug("ReplicationProcessor#process(): vmOptions = "
  			+ Arrays.asList(vmOptions));
  
  		List<Process> processesList = new ArrayList<Process>();
  		for (Object keyObject : clustersProperties.keySet()) {
  			String cluster = (String) keyObject;
  			String clustersPropertiesString = PropertiesHelper
  				.propertiesToString(clustersProperties);
  
  			debug("ReplicationProcessor#process(): Starting GuestNode with parameters: cluster = "
  				+ cluster
  				+ ", clustersPropertiesString = "
  				+ clustersPropertiesString
  				+ ", timeout = "
  				+ timeout
  				+ ", regionName = " + regionName);
  
  			Process process = javaProcessLauncher.runWithoutConfirmation(
  				"",
  				GuestNode.class,
  				vmOptions, new String[] { cluster, clustersPropertiesString,
  					String.valueOf(timeout), regionName,
  					String.valueOf(debugEnabled), String.valueOf(quiet),
  					String.valueOf(processingStartedAt) });
  
  			debug("ReplicationProcessor#process(): Adding GuestNode to processList");
  
  			processesList.add(process);
  		}
  
  		debug("ReplicationProcessor#process(): Waiting for processes finish");
  		int mainExitCode = 0;
  		int processNumber = 0;
  		for (Process process : processesList) {
  			debug("ReplicationProcessor#process(): Waiting for process #"
  				+ processNumber);
  
  			int exitCode = process.waitFor();
  
  			if (exitCode != 0) {
  				mainExitCode = 1;
  			}
  			debug("ReplicationProcessor#process(): Process #" + processNumber
  				+ " finished with exitCode = " + exitCode);
  
  			processNumber++;
  		}
  
  		debug("ReplicationProcessor#process(): Processing finished with mainExitCode = "
  			+ mainExitCode);
  
  		return mainExitCode;
  	}
docs: Creates, configures and runs the guest nodes and collects information
  form them
  
  @return - 0 in case of success, 1 otherwise
  
  @throws IOException
  @throws InterruptedException