@Override
  public SettableFuture<ConfigTaskResult> getSeriesSlotList(
      final GetSeriesSlotListStatement getSeriesSlotListStatement) {
    final SettableFuture<ConfigTaskResult> future = SettableFuture.create();
    TGetSeriesSlotListResp resp = new TGetSeriesSlotListResp();
    try (final ConfigNodeClient configNodeClient =
        CONFIG_NODE_CLIENT_MANAGER.borrowClient(ConfigNodeInfo.CONFIG_REGION_ID)) {
      final TGetSeriesSlotListReq tGetSeriesSlotListReq =
          new TGetSeriesSlotListReq(
              getSeriesSlotListStatement.getDatabase(),
              getSeriesSlotListStatement.getPartitionType());
      resp = configNodeClient.getSeriesSlotList(tGetSeriesSlotListReq);
      if (resp.getStatus().getCode() != TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
        future.setException(new IoTDBException(resp.getStatus().message, resp.getStatus().code));
        return future;
      }
    } catch (final Exception e) {
      future.setException(e);
    }
    GetSeriesSlotListTask.buildTsBlock(resp, future);
    return future;
  }
FIXME Consolidate this clientManager with the upper one.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/execution/config/executor/ClusterConfigTaskExecutor.java