code: @Override
      public void requeue(Task task) {
          int attempts = task.getAttempts();
          task.incrementAttempts();
          try {
              deleteTask(task);
          } catch (TaskNotFoundException e) {
              log.error("unable to delete " + task + " ignoring - requeuing anyway");
          }
  
          put(task);
          log.warn("requeued {} after {} failed attempts.", task, attempts);
  
      }
docs: /* (non-Javadoc)
  @see org.duracloud.queue.TaskQueue#requeue(org.duracloud.queue.task.Task)