I’m working on a Spring Boot project where I use Freemarker for templating. I have configured multiple TemplateLoaders in Freemarker’s configuration to load templates from two different CDN URLs: a baselineUrl and a dynamicUrl. The idea is that if a template is not found in the baselineUrl, it should fall back to the dynamicUrl.

Here is my configuration :

@Slf4j
@Configuration
@ConfigurationProperties("email")
@Data
public class FtlConfiguration {
  // https://dynamic/bhnpay-static/notification-template/ftl
  private String baselineUrl;
  // https://baseline/bhnpay-static/notification-template/ftl
  private String dynamicUrl;
  private long retentionTimeMillis;

  @Bean("emailConfiguration")
  public freemarker.template.Configuration createFtlConfigBean() throws IOException {
    freemarker.template.Configuration cfg = new freemarker.template.Configuration(
        freemarker.template.Configuration.VERSION_2_3_31);
    cfg.setDefaultEncoding(NotificationConstants.UTF_8);
    cfg.setLogTemplateExceptions(false);
    cfg.setWrapUncheckedExceptions(true);
    cfg.setFallbackOnNullLoopVariable(false);
    cfg.setLocalizedLookup(false);
    List<TemplateLoader> loaders = new ArrayList<>();
    // CloudTemplateLoader is just a wrapper on UrlTemplateLoader
    loaders.add(new CloudTemplateLoader(new URL(baselineUrl)));
    loaders.add(new CloudTemplateLoader(new URL(dynamicUrl)));
    cfg.setTemplateLoader(
        new MultiTemplateLoader(loaders.toArray(new TemplateLoader[0])));
    cfg.setCacheStorage(new MruCacheStorage(5000, Integer.MAX_VALUE));
    cfg.setTemplateUpdateDelayMilliseconds(retentionTimeMillis);
    return cfg;
  }

}

Below is how i am trying to load template :

@Component
@Slf4j
public class FtlTemplateHandler {

    private final Configuration configuration;

    @Autowired
    public FtlTemplateHandler(@Qualifier("emailConfiguration") Configuration configuration) {
        this.configuration = configuration;
    }

    public String getTemplateAsHtml(String emailTemplateUrl) {
        try {
            Template template = configuration.getTemplate(emailTemplateUrl);
            // Process the template
        } catch (IOException e) {
           try {
             log.info("removing template from cache {}", emailTemplateUrl);
             configuration.removeTemplateFromCache(emailTemplateUrl);
             Thread.sleep(10000);
           } catch (IOException | InterruptedException ex) {
             // process exception
           }
       }
    }
}

Getting error
Server returned HTTP response code: 403 for URL: https://baseline/bhnpay-static/notification-template/ftl/en-US/e17fa48f-d566-4085-b222-fbb8523e6ddc.ftl.
but the template is present at the dynamic url, that means after looking at baseline cdn it is not checking the dynamic cdn.

I have verified that the URLs are correct and accessible.
I tried clearing the cache to ensure it’s not a caching issue, but the fallback still doesn’t work.