IS-904: Make RC DB being Compacted before sending it to reward calculator

iconservice/icon_service_engine.py

@@ -2063,6 +2063,11 @@ def _recover_rc_db(cls, reader: 'WriteAheadLogReader', rc_data_path: str):
  rc_version, revision = get_version_and_revision(prev_calc_db)
  rc_version: int = max(rc_version, 0)
  prev_calc_db.close()
+
+ # Process compaction before send the RC DB to reward calculator
+ prev_calc_db_path: str = os.path.join(rc_data_path, RewardCalcStorage.CURRENT_IISS_DB_NAME)
+ RewardCalcStorage.process_db_compaction(prev_calc_db_path)
+
  calculate_block_height: int = reader.block.height - 1
  standby_rc_db_path: str = RewardCalcStorage.rename_current_db_to_standby_db(rc_data_path,
  calculate_block_height,

iconservice/iiss/reward_calc/storage.py

@@ -217,12 +217,25 @@ def replace_db(self, block_height: int) -> 'RewardCalcDBInfo':
  rc_version, _ = self.get_version_and_revision()
  rc_version: int = max(rc_version, 0)
  self._db.close()
+ # Process compaction before send the RC DB to reward calculator
+ self.process_db_compaction(os.path.join(self._path, self.CURRENT_IISS_DB_NAME))
 
  standby_db_path: str = self.rename_current_db_to_standby_db(self._path, block_height, rc_version)
  self._db = self.create_current_db(self._path)
 
  return RewardCalcDBInfo(standby_db_path, block_height)
 
+ @classmethod
+ def process_db_compaction(cls, path: str):
+ """
+ There is compatibility issue between C++ levelDB and go levelDB.
+ To solve it, should make DB being compacted before reading (from RC).
+ :param path: DB path to compact
+ :return:
+ """
+ db = KeyValueDatabase.from_path(path)
+ db.close()
+
  @classmethod
  def create_current_db(cls, rc_data_path: str) -> 'KeyValueDatabase':
  current_db_path = os.path.join(rc_data_path, cls.CURRENT_IISS_DB_NAME)