Data Inconsistency with MongoDB using mongo-go-driver

Question

FindOneAndReplace may or may not replace the document in MongoDB. The response indicates that the operation succeeded, but looking into MongoDB it was not updated at all.

The MongoDB server version is MongoDB server version: 3.2.0 This bug is reproducible in Ubuntu 16.04 and macOS Mojave. The target host is Azure CosmosDB.

The driver version is mongo-go-driver@v0.0.17

func (s *Service) DeleteFileMetadata(ctx context.Context, req *pb.DocumentRequest) (*pb.DocumentResponse, error) {
    log.Println("[INFO] Requesting DeleteFileMetadata service")

    if ok := isStateAvailable(); !ok {
        log.Printf("[ERROR] %s\n", errServiceUnavailable.Error())
        return nil, status.Error(codes.Unavailable, errServiceUnavailable.Error())
    }

    if err := refreshMongoDBConnection(mongoDBWriter, &conf.DocumentDB.Writer); err != nil {
        log.Printf("[ERROR] %s\n", err.Error())
        return nil, status.Error(codes.Internal, err.Error())
    }

    if req == nil {
        log.Printf("[ERROR] %s\n", errNilRequest.Error())
        return nil, status.Error(codes.InvalidArgument, errNilRequest.Error())
    }

    fileMetadataParameters := req.GetFileMetadataParameters()
    if fileMetadataParameters == nil || fileMetadataParameters.GetDuid() == "" {

        log.Printf("[ERROR] %s\n", errInvalidFileMetadataParameters.Error())
        return nil, status.Error(codes.InvalidArgument, errInvalidFileMetadataParameters.Error())
    }

    if err := ValidateDUID(fileMetadataParameters.GetDuid()); err != nil {
        log.Printf("[ERROR] %s\n", err.Error())
        return nil, status.Error(codes.InvalidArgument, err.Error())
    }

    if err := ValidateUUID(fileMetadataParameters.GetUuid()); err != nil {
        log.Printf("[ERROR] %s\n", err.Error())
        return nil, status.Error(codes.InvalidArgument, err.Error())
    }

    if err := ValidateFUID(fileMetadataParameters.GetFuid()); err != nil {
        log.Printf("[ERROR] %s\n", err.Error())
        return nil, status.Error(codes.InvalidArgument, err.Error())
    }

    if fileMetadataParameters.Media > pb.FileType_VIDEO {
        return nil, status.Error(codes.InvalidArgument, errMediaType.Error())
    }

    log.Printf("[INFO] FileMetadataParameters: \n%v\n\n", pretty.Sprint(req.GetFileMetadataParameters()))

    // Get the specific lock if it already exists, else make the lock
    lock, _ := duidClientLocker.LoadOrStore(fileMetadataParameters.GetDuid(), &sync.RWMutex{})
    // Lock
    lock.(*sync.RWMutex).Lock()
    // Unlock before the function exits
    defer lock.(*sync.RWMutex).Unlock()

    collection := mongoDBWriter.Database(conf.DocumentDB.Name).Collection(conf.DocumentDB.Collection)

    // Find all MongoDB documents for the specific uuid
    filter := bson.NewDocument(
        bson.EC.String("duid", fileMetadataParameters.GetDuid()),
        bson.EC.String("uuid", fileMetadataParameters.GetUuid()),
    )
    bsonResult := collection.FindOne(context.Background(), filter)
    if bsonResult == nil {
        log.Printf("[ERROR] FindOne: %s\n", errNoDocumentFound.Error())
        return nil, status.Error(codes.InvalidArgument, errNoDocumentFound.Error())
    }
    documentToUpdate := &pb.Document{}
    if err := bsonResult.Decode(documentToUpdate); err != nil {
        log.Printf("[ERROR] Document not found, duid: %s - uuid: %s - err: %s\n",
            fileMetadataParameters.GetDuid(), fileMetadataParameters.GetUuid(), err.Error())

        return nil, status.Errorf(codes.InvalidArgument,
            "Document not found, duid: %s - uuid: %s",
            fileMetadataParameters.GetDuid(), fileMetadataParameters.GetUuid())
    }

    log.Printf("[INFO] Document to update: \n%s\n\n", pretty.Sprint(documentToUpdate))

    switch fileMetadataParameters.Media {
    case pb.FileType_FILE:
        delete(documentToUpdate.GetFileUrlsMap(), fileMetadataParameters.GetFuid())
    case pb.FileType_AUDIO:
        delete(documentToUpdate.GetAudioUrlsMap(), fileMetadataParameters.GetFuid())
    case pb.FileType_IMAGE:
        delete(documentToUpdate.GetImageUrlsMap(), fileMetadataParameters.GetFuid())
    case pb.FileType_VIDEO:
        delete(documentToUpdate.GetVideoUrlsMap(), fileMetadataParameters.GetFuid())
    default:
        return nil, status.Error(codes.InvalidArgument, errMediaType.Error())
    }
    documentToUpdate.UpdateTimestamp = time.Now().UTC().Unix()

    // option to return the the document after update
    option := findopt.ReplaceOneBundle{}
    result := collection.FindOneAndReplace(context.Background(), filter, documentToUpdate,
        option.ReturnDocument(mongoopt.After))

    // Extract the updated MongoDB document
    if result == nil {
        log.Printf("[ERROR] Extracting updated document, duid: %s - uuid: %s\n",
            documentToUpdate.GetDuid(), documentToUpdate.GetUuid())

        return nil, status.Errorf(codes.Internal,
            "Extracting updated document duid: %s - uuid: %s",
            documentToUpdate.GetDuid(), documentToUpdate.GetUuid())
    }

    document := &pb.Document{}
    if err := result.Decode(document); err != nil {
        log.Printf("[ERROR] %s\n", err.Error())
        return nil, status.Errorf(codes.Internal, err.Error())
    }

    log.Printf("[INFO] Updated document: \n%s\n\n", pretty.Sprint(document))
    log.Printf("[INFO] Success deleting file metadata in document, duid: %s - uuid: %s - fuid: %s\n",
        document.GetDuid(), document.GetUuid(), fileMetadataParameters.GetFuid())

    return &pb.DocumentResponse{
        Status:  &pb.DocumentResponse_Code{Code: uint32(codes.OK)},
        Message: codes.OK.String(),
        Data:    document,
    }, nil
}

I expect that response reflects the actual state of the data in the MongoDB server.

Let us say I want to delete a filemetadata with fuid of 05ce38e7-a29a-485f-bf20-eef3501867f0

I get this response indicating that it was deleted. The response was decoded from result := collection.FindOneAndReplace(context.Background(), filter, documentToUpdate, option.ReturnDocument(mongoopt.After))

 ImageUrlsMap:         {217706a5-2f88-4eb2-8a93-c1426c5ac944: "https://hwscdevstorage.blob.core.windows.net/images/hulkgif.png",
                        4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/images/Rotating_earth_(large).gif"},
 AudioUrlsMap:         {4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/audios/Milad Hosseini - Deli Asheghetam [128].mp3",
                        8fe5fea7-f683-4198-8c94-f27601a5e2d0: "https://hwscdevstorage.blob.core.windows.net/audios/Seger_Conga_CaboMexico_Tag_Acousonde_20140313_112313_8000_3_BreedingMigrating.wav"},
 VideoUrlsMap:         {4ff30392-8ec8-45a4-ba94-5e22c4a686de: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.wmv",
                        4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.mp4",
                        e525ca9c-9813-4286-abda-8bd0eb6e94b4: "https://hwscdevstorage.blob.core.windows.net/videos/pusheen.mp4"},
 FileUrlsMap:          {13df1afa-4eee-470e-b9e2-60b2a7584994: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.wmv",
                        4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.mp4",
                        b7a16e10-ac03-468f-9b6d-dcc684d1147f: "https://hwscdevstorage.blob.core.windows.net/videos/pusheen.mp4"},
 RecordTimestamp:      1514764800,
 CreateTimestamp:      1539831496,
 UpdateTimestamp:      1546183549,
 IsPublic:             true,
 XXX_NoUnkeyedLiteral: {},
 XXX_unrecognized:     [],
 XXX_sizecache:        0}

2018/12/30 07:25:49 [INFO] Success deleting file metadata in document, duid: 1ChHfmKs8GX7D1XVf61lwVdisWf - uuid: 0XXXXSNJG0MQJHBF4QX1EFD6Y3 - fuid: 05ce38e7-a29a-485f-bf20-eef3501867f0

But if I go to Azure CosmosDB or in my local server, it is still there. screenshot

Answer 1

无法重现MongoDB Server 3.4中的错误