Check whether you have repeated channels in the spring integration context.

DuplicatedChannels.java

import org.xml.sax.SAXException;


@Component("duplicatedChannels")
public class DuplicatedChannels {
	private final Log logger = LogFactory.getLog(this.getClass());

	@Autowired
	private ApplicationContext appContext;
	
	private final String channelMsgTemplate = "The channel %s is repeated in the next files:%s";
	private final Pattern pattern = Pattern.compile("<int:channel.*id=\"(.*)\"");
	
	@PostConstruct
	public void check() throws ParserConfigurationException, SAXException, IOException, XPathExpressionException {
		Resource[] res = appContext.getResources("classpath:META-INF/**/*.xml");
		HashMap<String, List<String>> channels = new HashMap<String, List<String>>();
		int len = res.length;
		for (int i = 0; i < len; i++) {
			InputStream inputStream = res[i].getInputStream();
			String xml = IOUtils.toString(inputStream, "UTF-8");
			Matcher m = pattern.matcher(xml);
			boolean result = m.find();
			while(result) {
				String name = m.group(1);
				List<String> files = channels.get(name);
				if (files == null) {
					files = new ArrayList<String>();
				}
				files.add(res[i].getFilename());
				channels.put(name, files);
				result = m.find();
			}
		}
		
		Iterator<Entry<String, List<String>>> it = channels.entrySet().iterator();
		StringBuffer msgFiles = new StringBuffer();
		while (it.hasNext()) {
			Entry<String, List<String>> channel = it.next();
			List<String> files = channel.getValue();
			if (files.size() > 1) {
				for (String file: files) {
					msgFiles.append("\n" + file);
				}
				logger.warn(String.format(channelMsgTemplate, channel.getKey(), msgFiles));
				msgFiles.delete(0, msgFiles.length());
			}
		}
	}
}