Change the exception __SK_DEFAULT

[Alerinos]

If we add memory WithMemoryStorage to the build then an exception pops up Microsoft.SemanticKernel.KernelException: „Service not found: '__SK_DEFAULT' text embedding service not available”

Unfortunately we do not have documentation, so it is worth adding the information that we are missing in the config AddOpenAITextEmbeddingGenerationService. Alternatively, let's add documentation in the code next to this exception.

My code:

var kernel = new KernelBuilder()
            .WithLogger(CreateConsoleLogger())
            .Configure(config => {
                config.AddOpenAITextCompletionService("text-davinci-003", "xxx");
                })
            .WithMemoryStorage(new QdrantMemoryStore("xxx", 6333, 1536, CreateConsoleLogger()))
            .Build();

To bypass the exception it is sufficient to add a config which is missing from the documentation.

config.AddOpenAITextEmbeddingGenerationService("text-embedding-ada-002", "");

https://github.com/microsoft/semantic-kernel/blob/9faa7e935007d8628035c95f009d51ee35b13ab2/dotnet/src/SemanticKernel.Abstractions/KernelConfig.cs#L56

[sneha-afk]

With PR #2013 , AddOpenAITextCompletionService is no longer available, so this issue is not relevant anymore. Now the approach would be:

.WithOpenAITextCompletionService("text-davinci-003", "xxx")
.WithOpenAITextEmbeddingGenerationService("text-embedding-ada-002", "xxx")

Leaving out the text embedding service gives a clearer error message now:

Service not found: Service of type Microsoft.SemanticKernel.AI.Embeddings.ITextEmbeddingGeneration and name <NONE> not registered.

[nacharya1]

Thanks for informing us about this and glad to hear the issue is now resolved.