@Override
      public AsyncTable<ScanResultConsumer> build() {
        RawAsyncTableImpl rawTable =
          new RawAsyncTableImpl(AsyncConnectionImpl.this, RETRY_TIMER, this);
        return new AsyncTableImpl(rawTable, pool);
      }
If choreService has not been created yet, create the ChoreService.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionImpl.java