code: public void deleteFile(String filePath) {
          int retryCount = 1;
          while (retryCount <= deleteFileRetryCount) {
              try {
                  if (writer.getFS().exists(new Path(filePath))) {
                      Thread.sleep(1000 * retryCount);
                      writer.getFS().delete(new Path(filePath), false);
                      ++retryCount;
                  } else {
                      break;
                  }
              } catch (Exception e) {
                  log.warn("Exception while deleting the file: " + e.getMessage(), e);
              }
          }
      }
docs: With AWS EBS, sometimes deletion failure without any IOException was
  observed To prevent the surplus files, let's iterate file deletion.
  By default, it will try for five times.
  
  @param filePath