message: issue remove useless error log
diff: @@ -1206,8 +1206,16 @@ OP_NAMESPACE_BEGIN
  return ERR_ENTRY_NOT_EXIST;
  }
  Buffer start_buffer, end_buffer;
  - rocksdb::Slice start_key = to_rocksdb_slice(start.Encode(start_buffer));
  - rocksdb::Slice end_key = to_rocksdb_slice(end.Encode(end_buffer));
  + rocksdb::Slice start_key;
  + if (start.IsValid())
  + {
  + start_key = to_rocksdb_slice(start.Encode(start_buffer));
  + }
  + rocksdb::Slice end_key;
  + if (end.IsValid())
  + {
  + end_key = to_rocksdb_slice(end.Encode(end_buffer));
  + }
  rocksdb::CompactRangeOptions opt;
  rocksdb::Status s = m_db->CompactRange(opt, cf, start.IsValid() ? &start_key : NULL,
  end.IsValid() ? &end_key : NULL);
  