@Override
  public void cmdExecute(final @NotNull Message clientMessage,
      final @NotNull ServerConnection serverConnection,
      final @NotNull SecurityService securityService, long start)
      throws IOException, ClassNotFoundException, InterruptedException {
    String regionFullPath = null;
    regionFullPath = clientMessage.getPart(0).getCachedString();
    String errMessage = "";
    if (regionFullPath == null) {
      logger.warn("The input region path for the GetClientPartitionAttributes request is null");
      errMessage = "The input region path for the GetClientPartitionAttributes request is null";
      writeErrorResponse(clientMessage, MessageType.GET_CLIENT_PARTITION_ATTRIBUTES_ERROR,
          errMessage, serverConnection);
      serverConnection.setAsTrue(RESPONDED);
      return;
    }
    Region region = serverConnection.getCache().getRegion(regionFullPath);
    if (region == null) {
      logger.warn(
          "Region was not found during GetClientPartitionAttributes request for region path : {}",
          regionFullPath);
      errMessage =
          "Region was not found during GetClientPartitionAttributes request for region path : "
              + regionFullPath;
      writeErrorResponse(clientMessage, MessageType.GET_CLIENT_PARTITION_ATTRIBUTES_ERROR,
          errMessage, serverConnection);
      serverConnection.setAsTrue(RESPONDED);
      return;
    }

    try {
      Message responseMsg = serverConnection.getResponseMessage();
      responseMsg.setTransactionId(clientMessage.getTransactionId());
      responseMsg.setMessageType(MessageType.RESPONSE_CLIENT_PARTITION_ATTRIBUTES);

      if (!(region instanceof PartitionedRegion)) {
        responseMsg.setNumberOfParts(2);
        responseMsg.addObjPart(-1);
        responseMsg.addObjPart(region.getFullPath());
      } else {

        PartitionedRegion prRgion = (PartitionedRegion) region;

        PartitionResolver partitionResolver = prRgion.getPartitionResolver();
        int numParts = 2; // MINUMUM PARTS
        if (partitionResolver != null) {
          numParts++;
        }
        if (prRgion.isFixedPartitionedRegion()) {
          numParts++;
        }
        responseMsg.setNumberOfParts(numParts);
        // PART 1
        responseMsg.addObjPart(prRgion.getTotalNumberOfBuckets());

        // PART 2
        String leaderRegionPath = null;
        PartitionedRegion leaderRegion = null;
        String leaderRegionName = prRgion.getColocatedWith();
        if (leaderRegionName != null) {
          Cache cache = prRgion.getCache();
          while (leaderRegionName != null) {
            leaderRegion = (PartitionedRegion) cache.getRegion(leaderRegionName);
            if (leaderRegion.getColocatedWith() == null) {
              leaderRegionPath = leaderRegion.getFullPath();
              break;
            } else {
              leaderRegionName = leaderRegion.getColocatedWith();
            }
          }
        }
        responseMsg.addObjPart(leaderRegionPath);

        // PART 3
        if (partitionResolver != null) {
          responseMsg.addObjPart(partitionResolver.getClass().toString().substring(6));
        }
        // PART 4
        if (prRgion.isFixedPartitionedRegion()) {
          Set<FixedPartitionAttributes> fpaSet = null;
          if (leaderRegion != null) {
            fpaSet = PartitionedRegionHelper.getAllFixedPartitionAttributes(leaderRegion);
          } else {
            fpaSet = PartitionedRegionHelper.getAllFixedPartitionAttributes(prRgion);
          }
          responseMsg.addObjPart(fpaSet);
        }
      }
      responseMsg.send();
      clientMessage.clearParts();
    } catch (Exception e) {
      writeException(clientMessage, e, false, serverConnection);
    } finally {
      serverConnection.setAsTrue(Command.RESPONDED);
    }

  }
{@link Command} for {@link GetClientPartitionAttributesOp} operation for 6.6 clients

@since GemFire 6.6
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/command/GetClientPartitionAttributesCommand66.java