Examples with GetResponse com.github.ambry.protocol.GetResponse used on opensource projects

Example 11 with GetResponse

use of com.github.ambry.protocol.GetResponse in project ambry by linkedin.

the class ServerTestUtil method checkBlobContent.

private static void checkBlobContent(MockClusterMap clusterMap, BlobId blobId, BlockingChannel channel, byte[] dataToCheck, byte[] encryptionKey) throws IOException, MessageFormatException {
    ArrayList<BlobId> listIds = new ArrayList<BlobId>();
    listIds.add(blobId);
    ArrayList<PartitionRequestInfo> partitionRequestInfoList = new ArrayList<PartitionRequestInfo>();
    partitionRequestInfoList.clear();
    PartitionRequestInfo partitionRequestInfo = new PartitionRequestInfo(blobId.getPartition(), listIds);
    partitionRequestInfoList.add(partitionRequestInfo);
    GetRequest getRequest3 = new GetRequest(1, "clientid2", MessageFormatFlags.Blob, partitionRequestInfoList, GetOption.None);
    channel.send(getRequest3);
    InputStream stream = channel.receive().getInputStream();
    GetResponse resp = GetResponse.readFrom(new DataInputStream(stream), clusterMap);
    assertEquals(ServerErrorCode.No_Error, resp.getError());
    BlobData blobData = MessageFormatRecord.deserializeBlob(resp.getInputStream());
    byte[] blobout = new byte[(int) blobData.getSize()];
    int readsize = 0;
    while (readsize < blobData.getSize()) {
        readsize += blobData.getStream().read(blobout, readsize, (int) blobData.getSize() - readsize);
    }
    Assert.assertArrayEquals(dataToCheck, blobout);
    if (encryptionKey != null) {
        Assert.assertNotNull("EncryptionKey should not have been null", resp.getPartitionResponseInfoList().get(0).getMessageMetadataList().get(0));
        Assert.assertArrayEquals("EncryptionKey mismatch", encryptionKey, resp.getPartitionResponseInfoList().get(0).getMessageMetadataList().get(0).getEncryptionKey().array());
    } else {
        Assert.assertNull("EncryptionKey should have been null", resp.getPartitionResponseInfoList().get(0).getMessageMetadataList().get(0));
    }
}

Example 12 with GetResponse

use of com.github.ambry.protocol.GetResponse in project ambry by linkedin.

the class Verifier method run.

@Override
public void run() {
    try {
        ArrayList<PartitionRequestInfo> partitionRequestInfoList = new ArrayList<PartitionRequestInfo>();
        while (requestsVerified.get() != totalRequests.get() && !cancelTest.get()) {
            Payload payload = payloadQueue.poll(1000, TimeUnit.MILLISECONDS);
            if (payload != null) {
                notificationSystem.awaitBlobCreations(payload.blobId);
                for (MockDataNodeId dataNodeId : clusterMap.getDataNodes()) {
                    ConnectedChannel channel1 = null;
                    try {
                        Port port = new Port(portType == PortType.PLAINTEXT ? dataNodeId.getPort() : dataNodeId.getSSLPort(), portType);
                        channel1 = connectionPool.checkOutConnection("localhost", port, 10000);
                        ArrayList<BlobId> ids = new ArrayList<BlobId>();
                        ids.add(new BlobId(payload.blobId, clusterMap));
                        partitionRequestInfoList.clear();
                        PartitionRequestInfo partitionRequestInfo = new PartitionRequestInfo(ids.get(0).getPartition(), ids);
                        partitionRequestInfoList.add(partitionRequestInfo);
                        GetRequest getRequest = new GetRequest(1, "clientid2", MessageFormatFlags.BlobProperties, partitionRequestInfoList, GetOption.None);
                        channel1.send(getRequest);
                        InputStream stream = channel1.receive().getInputStream();
                        GetResponse resp = GetResponse.readFrom(new DataInputStream(stream), clusterMap);
                        if (resp.getError() != ServerErrorCode.No_Error) {
                            System.out.println(dataNodeId.getHostname() + " " + dataNodeId.getPort() + " " + resp.getError());
                            throw new IllegalStateException();
                        } else {
                            try {
                                BlobProperties propertyOutput = MessageFormatRecord.deserializeBlobProperties(resp.getInputStream());
                                if (propertyOutput.getBlobSize() != payload.blobProperties.getBlobSize()) {
                                    String exceptionMsg = "blob size not matching " + " expected " + payload.blobProperties.getBlobSize() + " actual " + propertyOutput.getBlobSize();
                                    System.out.println(exceptionMsg);
                                    throw new IllegalStateException(exceptionMsg);
                                }
                                if (!propertyOutput.getServiceId().equals(payload.blobProperties.getServiceId())) {
                                    String exceptionMsg = "service id not matching " + " expected " + payload.blobProperties.getServiceId() + " actual " + propertyOutput.getBlobSize();
                                    System.out.println(exceptionMsg);
                                    throw new IllegalStateException(exceptionMsg);
                                }
                                if (propertyOutput.getAccountId() != payload.blobProperties.getAccountId()) {
                                    String exceptionMsg = "accountid not matching " + " expected " + payload.blobProperties.getAccountId() + " actual " + propertyOutput.getAccountId();
                                    System.out.println(exceptionMsg);
                                    throw new IllegalStateException(exceptionMsg);
                                }
                                if (propertyOutput.getContainerId() != payload.blobProperties.getContainerId()) {
                                    String exceptionMsg = "containerId not matching " + " expected " + payload.blobProperties.getContainerId() + " actual " + propertyOutput.getContainerId();
                                    System.out.println(exceptionMsg);
                                    throw new IllegalStateException(exceptionMsg);
                                }
                                if (propertyOutput.isEncrypted() != payload.blobProperties.isEncrypted()) {
                                    String exceptionMsg = "IsEncrypted not matching " + " expected " + payload.blobProperties.isEncrypted() + " actual " + propertyOutput.isEncrypted();
                                    System.out.println(exceptionMsg);
                                    throw new IllegalStateException(exceptionMsg);
                                }
                            } catch (MessageFormatException e) {
                                e.printStackTrace();
                                throw new IllegalStateException();
                            }
                        }
                        // get user metadata
                        ids.clear();
                        ids.add(new BlobId(payload.blobId, clusterMap));
                        partitionRequestInfoList.clear();
                        partitionRequestInfo = new PartitionRequestInfo(ids.get(0).getPartition(), ids);
                        partitionRequestInfoList.add(partitionRequestInfo);
                        getRequest = new GetRequest(1, "clientid2", MessageFormatFlags.BlobUserMetadata, partitionRequestInfoList, GetOption.None);
                        channel1.send(getRequest);
                        stream = channel1.receive().getInputStream();
                        resp = GetResponse.readFrom(new DataInputStream(stream), clusterMap);
                        if (resp.getError() != ServerErrorCode.No_Error) {
                            System.out.println("Error after get user metadata " + resp.getError());
                            throw new IllegalStateException();
                        } else {
                            try {
                                ByteBuffer userMetadataOutput = MessageFormatRecord.deserializeUserMetadata(resp.getInputStream());
                                if (userMetadataOutput.compareTo(ByteBuffer.wrap(payload.metadata)) != 0) {
                                    throw new IllegalStateException();
                                }
                            } catch (MessageFormatException e) {
                                e.printStackTrace();
                                throw new IllegalStateException();
                            }
                        }
                        // get blob
                        ids.clear();
                        ids.add(new BlobId(payload.blobId, clusterMap));
                        partitionRequestInfoList.clear();
                        partitionRequestInfo = new PartitionRequestInfo(ids.get(0).getPartition(), ids);
                        partitionRequestInfoList.add(partitionRequestInfo);
                        getRequest = new GetRequest(1, "clientid2", MessageFormatFlags.Blob, partitionRequestInfoList, GetOption.None);
                        channel1.send(getRequest);
                        stream = channel1.receive().getInputStream();
                        resp = GetResponse.readFrom(new DataInputStream(stream), clusterMap);
                        // System.out.println("response from get " + resp.getError());
                        if (resp.getError() != ServerErrorCode.No_Error) {
                            System.out.println("Error after get blob " + resp.getError());
                            throw new IllegalStateException();
                        } else {
                            try {
                                BlobData blobData = MessageFormatRecord.deserializeBlob(resp.getInputStream());
                                byte[] blobout = new byte[(int) blobData.getSize()];
                                int readsize = 0;
                                while (readsize < blobData.getSize()) {
                                    readsize += blobData.getStream().read(blobout, readsize, (int) blobData.getSize() - readsize);
                                }
                                if (ByteBuffer.wrap(blobout).compareTo(ByteBuffer.wrap(payload.blob)) != 0) {
                                    throw new IllegalStateException();
                                }
                            } catch (MessageFormatException e) {
                                e.printStackTrace();
                                throw new IllegalStateException();
                            }
                        }
                        // get blob all
                        getRequest = new GetRequest(1, "clientid2", MessageFormatFlags.All, partitionRequestInfoList, GetOption.None);
                        channel1.send(getRequest);
                        stream = channel1.receive().getInputStream();
                        resp = GetResponse.readFrom(new DataInputStream(stream), clusterMap);
                        if (resp.getError() != ServerErrorCode.No_Error) {
                            System.out.println("Error after get blob " + resp.getError());
                            throw new IllegalStateException();
                        } else {
                            try {
                                BlobAll blobAll = MessageFormatRecord.deserializeBlobAll(resp.getInputStream(), new BlobIdFactory(clusterMap));
                                byte[] blobout = new byte[(int) blobAll.getBlobData().getSize()];
                                int readsize = 0;
                                while (readsize < blobAll.getBlobData().getSize()) {
                                    readsize += blobAll.getBlobData().getStream().read(blobout, readsize, (int) blobAll.getBlobData().getSize() - readsize);
                                }
                                if (ByteBuffer.wrap(blobout).compareTo(ByteBuffer.wrap(payload.blob)) != 0) {
                                    throw new IllegalStateException();
                                }
                            } catch (MessageFormatException e) {
                                e.printStackTrace();
                                throw new IllegalStateException();
                            }
                        }
                    } catch (Exception e) {
                        if (channel1 != null) {
                            connectionPool.destroyConnection(channel1);
                            channel1 = null;
                        }
                    } finally {
                        if (channel1 != null) {
                            connectionPool.checkInConnection(channel1);
                            channel1 = null;
                        }
                    }
                }
                requestsVerified.incrementAndGet();
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        cancelTest.set(true);
    } finally {
        completedLatch.countDown();
    }
}

Example 13 with GetResponse

use of com.github.ambry.protocol.GetResponse in project ambry by linkedin.

the class AmbryRequests method handleGetRequest.

public void handleGetRequest(Request request) throws IOException, InterruptedException {
    GetRequest getRequest = GetRequest.readFrom(new DataInputStream(request.getInputStream()), clusterMap);
    Histogram responseQueueTime = null;
    Histogram responseSendTime = null;
    Histogram responseTotalTime = null;
    long requestQueueTime = SystemTime.getInstance().milliseconds() - request.getStartTimeInMs();
    long totalTimeSpent = requestQueueTime;
    if (getRequest.getMessageFormatFlag() == MessageFormatFlags.Blob) {
        metrics.getBlobRequestQueueTimeInMs.update(requestQueueTime);
        metrics.getBlobRequestRate.mark();
        responseQueueTime = metrics.getBlobResponseQueueTimeInMs;
        responseSendTime = metrics.getBlobSendTimeInMs;
        responseTotalTime = metrics.getBlobTotalTimeInMs;
    } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.BlobProperties) {
        metrics.getBlobPropertiesRequestQueueTimeInMs.update(requestQueueTime);
        metrics.getBlobPropertiesRequestRate.mark();
        responseQueueTime = metrics.getBlobPropertiesResponseQueueTimeInMs;
        responseSendTime = metrics.getBlobPropertiesSendTimeInMs;
        responseTotalTime = metrics.getBlobPropertiesTotalTimeInMs;
    } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.BlobUserMetadata) {
        metrics.getBlobUserMetadataRequestQueueTimeInMs.update(requestQueueTime);
        metrics.getBlobUserMetadataRequestRate.mark();
        responseQueueTime = metrics.getBlobUserMetadataResponseQueueTimeInMs;
        responseSendTime = metrics.getBlobUserMetadataSendTimeInMs;
        responseTotalTime = metrics.getBlobUserMetadataTotalTimeInMs;
    } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.BlobInfo) {
        metrics.getBlobInfoRequestQueueTimeInMs.update(requestQueueTime);
        metrics.getBlobInfoRequestRate.mark();
        responseQueueTime = metrics.getBlobInfoResponseQueueTimeInMs;
        responseSendTime = metrics.getBlobInfoSendTimeInMs;
        responseTotalTime = metrics.getBlobInfoTotalTimeInMs;
    } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.All) {
        metrics.getBlobAllRequestQueueTimeInMs.update(requestQueueTime);
        metrics.getBlobAllRequestRate.mark();
        responseQueueTime = metrics.getBlobAllResponseQueueTimeInMs;
        responseSendTime = metrics.getBlobAllSendTimeInMs;
        responseTotalTime = metrics.getBlobAllTotalTimeInMs;
    }
    long startTime = SystemTime.getInstance().milliseconds();
    GetResponse response = null;
    try {
        List<Send> messagesToSendList = new ArrayList<Send>(getRequest.getPartitionInfoList().size());
        List<PartitionResponseInfo> partitionResponseInfoList = new ArrayList<PartitionResponseInfo>(getRequest.getPartitionInfoList().size());
        for (PartitionRequestInfo partitionRequestInfo : getRequest.getPartitionInfoList()) {
            ServerErrorCode error = validateRequest(partitionRequestInfo.getPartition(), RequestOrResponseType.GetRequest);
            if (error != ServerErrorCode.No_Error) {
                logger.error("Validating get request failed for partition {} with error {}", partitionRequestInfo.getPartition(), error);
                PartitionResponseInfo partitionResponseInfo = new PartitionResponseInfo(partitionRequestInfo.getPartition(), error);
                partitionResponseInfoList.add(partitionResponseInfo);
            } else {
                try {
                    Store storeToGet = storageManager.getStore(partitionRequestInfo.getPartition());
                    EnumSet<StoreGetOptions> storeGetOptions = EnumSet.noneOf(StoreGetOptions.class);
                    // Currently only one option is supported.
                    if (getRequest.getGetOption() == GetOption.Include_Expired_Blobs) {
                        storeGetOptions = EnumSet.of(StoreGetOptions.Store_Include_Expired);
                    }
                    if (getRequest.getGetOption() == GetOption.Include_Deleted_Blobs) {
                        storeGetOptions = EnumSet.of(StoreGetOptions.Store_Include_Deleted);
                    }
                    if (getRequest.getGetOption() == GetOption.Include_All) {
                        storeGetOptions = EnumSet.of(StoreGetOptions.Store_Include_Deleted, StoreGetOptions.Store_Include_Expired);
                    }
                    StoreInfo info = storeToGet.get(partitionRequestInfo.getBlobIds(), storeGetOptions);
                    MessageFormatSend blobsToSend = new MessageFormatSend(info.getMessageReadSet(), getRequest.getMessageFormatFlag(), messageFormatMetrics, storeKeyFactory);
                    PartitionResponseInfo partitionResponseInfo = new PartitionResponseInfo(partitionRequestInfo.getPartition(), info.getMessageReadSetInfo(), blobsToSend.getMessageMetadataList());
                    messagesToSendList.add(blobsToSend);
                    partitionResponseInfoList.add(partitionResponseInfo);
                } catch (StoreException e) {
                    boolean logInErrorLevel = false;
                    if (e.getErrorCode() == StoreErrorCodes.ID_Not_Found) {
                        metrics.idNotFoundError.inc();
                    } else if (e.getErrorCode() == StoreErrorCodes.TTL_Expired) {
                        metrics.ttlExpiredError.inc();
                    } else if (e.getErrorCode() == StoreErrorCodes.ID_Deleted) {
                        metrics.idDeletedError.inc();
                    } else if (e.getErrorCode() == StoreErrorCodes.Authorization_Failure) {
                        metrics.getAuthorizationFailure.inc();
                    } else {
                        metrics.unExpectedStoreGetError.inc();
                        logInErrorLevel = true;
                    }
                    if (logInErrorLevel) {
                        logger.error("Store exception on a get with error code {} for partition {}", e.getErrorCode(), partitionRequestInfo.getPartition(), e);
                    } else {
                        logger.trace("Store exception on a get with error code {} for partition {}", e.getErrorCode(), partitionRequestInfo.getPartition(), e);
                    }
                    PartitionResponseInfo partitionResponseInfo = new PartitionResponseInfo(partitionRequestInfo.getPartition(), ErrorMapping.getStoreErrorMapping(e.getErrorCode()));
                    partitionResponseInfoList.add(partitionResponseInfo);
                } catch (MessageFormatException e) {
                    logger.error("Message format exception on a get with error code " + e.getErrorCode() + " for partitionRequestInfo " + partitionRequestInfo, e);
                    if (e.getErrorCode() == MessageFormatErrorCodes.Data_Corrupt) {
                        metrics.dataCorruptError.inc();
                    } else if (e.getErrorCode() == MessageFormatErrorCodes.Unknown_Format_Version) {
                        metrics.unknownFormatError.inc();
                    }
                    PartitionResponseInfo partitionResponseInfo = new PartitionResponseInfo(partitionRequestInfo.getPartition(), ErrorMapping.getMessageFormatErrorMapping(e.getErrorCode()));
                    partitionResponseInfoList.add(partitionResponseInfo);
                }
            }
        }
        CompositeSend compositeSend = new CompositeSend(messagesToSendList);
        response = new GetResponse(getRequest.getCorrelationId(), getRequest.getClientId(), partitionResponseInfoList, compositeSend, ServerErrorCode.No_Error);
    } catch (Exception e) {
        logger.error("Unknown exception for request " + getRequest, e);
        response = new GetResponse(getRequest.getCorrelationId(), getRequest.getClientId(), ServerErrorCode.Unknown_Error);
    } finally {
        long processingTime = SystemTime.getInstance().milliseconds() - startTime;
        totalTimeSpent += processingTime;
        publicAccessLogger.info("{} {} processingTime {}", getRequest, response, processingTime);
        if (getRequest.getMessageFormatFlag() == MessageFormatFlags.Blob) {
            metrics.getBlobProcessingTimeInMs.update(processingTime);
            metrics.updateGetBlobProcessingTimeBySize(response.sizeInBytes(), processingTime);
        } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.BlobProperties) {
            metrics.getBlobPropertiesProcessingTimeInMs.update(processingTime);
        } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.BlobUserMetadata) {
            metrics.getBlobUserMetadataProcessingTimeInMs.update(processingTime);
        } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.BlobInfo) {
            metrics.getBlobInfoProcessingTimeInMs.update(processingTime);
        } else if (getRequest.getMessageFormatFlag() == MessageFormatFlags.All) {
            metrics.getBlobAllProcessingTimeInMs.update(processingTime);
            metrics.updateGetBlobProcessingTimeBySize(response.sizeInBytes(), processingTime);
        }
    }
    sendGetResponse(requestResponseChannel, response, request, responseQueueTime, responseSendTime, responseTotalTime, totalTimeSpent, response.sizeInBytes(), getRequest.getMessageFormatFlag(), metrics);
}

Example 14 with GetResponse

use of com.github.ambry.protocol.GetResponse in project ambry by linkedin.

the class AmbryRequestsTest method sendAndVerifyOperationRequest.

/**
 * Sends and verifies that an operation specific request works correctly.
 * @param requestType the type of the request to send.
 * @param ids the partitionIds to send requests for.
 * @param expectedErrorCode the {@link ServerErrorCode} expected in the response. For some requests this is the
 *                          response in the constituents rather than the actual response ({@link GetResponse} and
 *                          {@link ReplicaMetadataResponse}).
 * @throws InterruptedException
 * @throws IOException
 */
private void sendAndVerifyOperationRequest(RequestOrResponseType requestType, List<? extends PartitionId> ids, ServerErrorCode expectedErrorCode) throws InterruptedException, IOException {
    for (PartitionId id : ids) {
        int correlationId = TestUtils.RANDOM.nextInt();
        String clientId = UtilsTest.getRandomString(10);
        BlobId blobId = new BlobId(CommonTestUtils.getCurrentBlobIdVersion(), BlobId.BlobIdType.NATIVE, ClusterMapUtils.UNKNOWN_DATACENTER_ID, Utils.getRandomShort(TestUtils.RANDOM), Utils.getRandomShort(TestUtils.RANDOM), id, false);
        RequestOrResponse request;
        switch(requestType) {
            case PutRequest:
                BlobProperties properties = new BlobProperties(0, "serviceId", blobId.getAccountId(), blobId.getAccountId(), false);
                request = new PutRequest(correlationId, clientId, blobId, properties, ByteBuffer.allocate(0), ByteBuffer.allocate(0), 0, BlobType.DataBlob, null);
                break;
            case DeleteRequest:
                request = new DeleteRequest(correlationId, clientId, blobId, SystemTime.getInstance().milliseconds());
                break;
            case GetRequest:
                PartitionRequestInfo pRequestInfo = new PartitionRequestInfo(id, Collections.singletonList(blobId));
                request = new GetRequest(correlationId, clientId, MessageFormatFlags.All, Collections.singletonList(pRequestInfo), GetOption.Include_All);
                break;
            case ReplicaMetadataRequest:
                ReplicaMetadataRequestInfo rRequestInfo = new ReplicaMetadataRequestInfo(id, FIND_TOKEN_FACTORY.getNewFindToken(), "localhost", "/tmp");
                request = new ReplicaMetadataRequest(correlationId, clientId, Collections.singletonList(rRequestInfo), Long.MAX_VALUE);
                break;
            default:
                throw new IllegalArgumentException(requestType + " not supported by this function");
        }
        storageManager.resetStore();
        Response response = sendRequestGetResponse(request, requestType == RequestOrResponseType.GetRequest || requestType == RequestOrResponseType.ReplicaMetadataRequest ? ServerErrorCode.No_Error : expectedErrorCode);
        if (expectedErrorCode.equals(ServerErrorCode.No_Error)) {
            assertEquals("Operation received at the store not as expected", requestType, MockStorageManager.operationReceived);
        }
        if (requestType == RequestOrResponseType.GetRequest) {
            GetResponse getResponse = (GetResponse) response;
            for (PartitionResponseInfo info : getResponse.getPartitionResponseInfoList()) {
                assertEquals("Error code does not match expected", expectedErrorCode, info.getErrorCode());
            }
        } else if (requestType == RequestOrResponseType.ReplicaMetadataRequest) {
            ReplicaMetadataResponse replicaMetadataResponse = (ReplicaMetadataResponse) response;
            for (ReplicaMetadataResponseInfo info : replicaMetadataResponse.getReplicaMetadataResponseInfoList()) {
                assertEquals("Error code does not match expected", expectedErrorCode, info.getError());
            }
        }
    }
}

Example 15 with GetResponse

use of com.github.ambry.protocol.GetResponse in project ambry by linkedin.

the class ServerAdminTool method getGetResponse.

/**
 * Sends a {@link GetRequest} based on the provided parameters and returns the response stream if the request was
 * successful. {@code null} otherwise.
 * @param dataNodeId the {@link DataNodeId} to contact.
 * @param blobId the {@link BlobId} to operate on.
 * @param flags the {@link MessageFormatFlags} associated with the {@link GetRequest}.
 * @param getOption the {@link GetOption} to send with the {@link GetRequest}.
 * @param clusterMap the {@link ClusterMap} to use.
 * @return the {@link ServerErrorCode} and response stream if the request was successful. {@code null} for the
 * response stream otherwise.
 * @throws Exception
 */
private Pair<ServerErrorCode, InputStream> getGetResponse(DataNodeId dataNodeId, BlobId blobId, MessageFormatFlags flags, GetOption getOption, ClusterMap clusterMap) throws Exception {
    PartitionRequestInfo partitionRequestInfo = new PartitionRequestInfo(blobId.getPartition(), Collections.singletonList(blobId));
    List<PartitionRequestInfo> partitionRequestInfos = new ArrayList<>();
    partitionRequestInfos.add(partitionRequestInfo);
    GetRequest getRequest = new GetRequest(correlationId.incrementAndGet(), CLIENT_ID, flags, partitionRequestInfos, getOption);
    InputStream serverResponseStream = new ByteBufferInputStream(sendRequestGetResponse(dataNodeId, getRequest));
    GetResponse getResponse = GetResponse.readFrom(new DataInputStream(serverResponseStream), clusterMap);
    ServerErrorCode partitionErrorCode = getResponse.getPartitionResponseInfoList().get(0).getErrorCode();
    ServerErrorCode errorCode = partitionErrorCode == ServerErrorCode.No_Error ? getResponse.getError() : partitionErrorCode;
    InputStream stream = errorCode == ServerErrorCode.No_Error ? getResponse.getInputStream() : null;
    return new Pair<>(errorCode, stream);
}