Distcp file length comparison have no effect

        DistCpUtils.compareFileLengthsAndChecksums(source.getLen(), sourceFS,
                sourcePath, sourceChecksum, targetFS,
                targetPath, skipCrc, source.getLen());

public static void compareFileLengthsAndChecksums(long srcLen,
           FileSystem sourceFS, Path source, FileChecksum sourceChecksum,
           FileSystem targetFS, Path target, boolean skipCrc,
           long targetLen) throws IOException {
  if (srcLen != targetLen) {
    throw new IOException(
        DistCpConstants.LENGTH_MISMATCH_ERROR_MSG + source + " (" + srcLen
            + ") and target:" + target + " (" + targetLen + ")");
  }

        DistCpUtils.compareFileLengthsAndChecksums(source.getLen(), sourceFS,
                sourcePath, sourceChecksum, targetFS,
                targetPath, skipCrc, offset + bytesRead);