@Override
  protected int doWork() throws Exception {
    return (validateDBE() == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
  }
Check DataBlockEncodings of column families are compatible.
@return number of column families with incompatible DataBlockEncoding
@throws IOException if a remote or network exception occurs
hbase-server/src/main/java/org/apache/hadoop/hbase/tool/DataBlockEncodingValidator.java