output: #fixed code
                                  protected void start() {
          if (started) {
              throw new IllegalStateException("Filter already started. Make sure to specify just keycloakConfigResolver or keycloakConfigFile but not both");
          }
  
          if (keycloakConfigResolverClass != null) {
              Class<? extends KeycloakConfigResolver> resolverClass = loadResolverClass();
  
              try {
                  KeycloakConfigResolver resolver = resolverClass.newInstance();
                  log.info("Using " + resolver + " to resolve Keycloak configuration on a per-request basis.");
                  this.deploymentContext = new AdapterDeploymentContext(resolver);
              } catch (Exception e) {
                  throw new RuntimeException("Unable to instantiate resolver " + resolverClass);
              }
          } else {
              if (keycloakConfigFile == null) {
                  throw new IllegalArgumentException("You need to specify either keycloakConfigResolverClass or keycloakConfigFile in configuration");
              }
              InputStream is = loadKeycloakConfigFile();
              KeycloakDeployment kd = KeycloakDeploymentBuilder.build(is);
              deploymentContext = new AdapterDeploymentContext(kd);
              log.info("Keycloak is using a per-deployment configuration loaded from: " + keycloakConfigFile);
          }
  
          nodesRegistrationManagement = new NodesRegistrationManagement();
          started = true;
      }
input: #vulnerable code 
                                  protected void start() {
          if (started) {
              throw new IllegalStateException("Filter already started. Make sure to specify just keycloakConfigResolver or keycloakConfigFile but not both");
          }
  
          if (keycloakConfigResolverClass != null) {
              Class<?> clazz;
              try {
                  clazz = getClass().getClassLoader().loadClass(keycloakConfigResolverClass);
              } catch (ClassNotFoundException cnfe) {
                  // Fallback to tccl
                  try {
                      clazz = Thread.currentThread().getContextClassLoader().loadClass(keycloakConfigResolverClass);
                  } catch (ClassNotFoundException cnfe2) {
                      throw new RuntimeException("Unable to find resolver class: " + keycloakConfigResolverClass);
                  }
              }
  
              try {
                  KeycloakConfigResolver resolver = (KeycloakConfigResolver) clazz.newInstance();
                  log.info("Using " + resolver + " to resolve Keycloak configuration on a per-request basis.");
                  this.deploymentContext = new AdapterDeploymentContext(resolver);
              } catch (Exception e) {
                  throw new RuntimeException("Unable to instantiate resolver " + clazz);
              }
          } else {
              if (keycloakConfigFile == null) {
                  throw new IllegalArgumentException("You need to specify either keycloakConfigResolverClass or keycloakConfigFile in configuration");
              }
              InputStream is = readConfigFile();
              KeycloakDeployment kd = KeycloakDeploymentBuilder.build(is);
              deploymentContext = new AdapterDeploymentContext(kd);
              log.info("Keycloak is using a per-deployment configuration loaded from: " + keycloakConfigFile);
          }
  
          nodesRegistrationManagement = new NodesRegistrationManagement();
          started = true;
      } 
                              #location 31 
                              #vulnerability type RESOURCE_LEAK