rag

RAG prompt template rendering error during performance benchmark on Kubernetes

by
a group of blue boxes

Problem The retrieval‑augmented generation (RAG) service deployed on a Kubernetes cluster fails during the performance benchmark phase with a prompt template rendering error. The error appears only under load and aborts the benchmark run, causing the following observable symptoms: Benchmark client receives HTTP 500 responses with body {“error”:”PromptTemplateError: variable ‘context’ is undefined”}. Pod logs contain stack … Read more

Redis vector store initialization fails with storage class not found locally

by
photo of computer cables

Problem – “Storage class not found” when initializing a Redis vector store locally During local development of an embedding‑retrieval service, the application crashes on start‑up with an exception similar to: Traceback (most recent call last): File “app.py”, line 42, in <module> vector_store = RedisVectorStore.from_documents(docs, embedding) File “…/redis_vector_store.py”, line 87, in from_documents raise ValueError(“Storage class not … Read more

GPT-3.5 RAG sub‑query generation empty results after model update

by
cable network

Problem The Retrieval‑Augmented Generation (RAG) service receives a user query, asks GPT‑3.5 to decompose it into sub‑queries, and then uses each sub‑query as a key for a vector‑store lookup. After a recent model update the service started returning empty or irrelevant document sets: Log entry: INFO sub‑queries generated: [] Log entry: WARN vector search returned … Read more

Redis RAG context injection failure after serialization error in pipeline

by
photo of computer cables

Problem – Missing or Corrupted RAG Context after Pipeline Serialization During the nightly data pipeline that populates a Redis vector store for Retrieval‑Augmented Generation (RAG), the downstream language‑model inference service receives prompts that lack the expected retrieved documents. The prompts contain empty context fields or truncated JSON blobs, resulting in hallucinations or incomplete answers. Typical … Read more

RAG query decomposition error after adding new microservice on GCP Compute

by
photo of computer cables

RAG Query Decomposition Error After Adding a New Microservice on GCP Compute Problem After deploying a new stateless microservice (order‑processor) on a GCP Compute Engine instance, the Retrieval‑Augmented Generation (RAG) service began returning DecompositionError: unable to split query into sub‑queries. The error appears only for multi‑step queries that require data from both the existing inventory … Read more

Kubernetes storage class not found error deploying Hugging Face model

by
A detailed red and blue robot with glowing eyes

Problem: “StorageClass not found” when deploying a Hugging Face Transformers model During the CI/CD pipeline a Deployment that mounts a PersistentVolumeClaim for the model artifacts fails with the following error: error: failed to create pod sandbox: rpc error: code = Unknown desc = failed to provision volume with StorageClass “fast-ssd”: storageclass.storage.k8s.io “fast-ssd” not found The … Read more

Claude streaming RAG citations missing fields after schema change

by
Glossy purple tubes with distorted text and reflections

Problem In a production Retrieval‑Augmented Generation (RAG) pipeline that streams responses from Anthropic Claude, the generated citations no longer match the required JSON schema. Symptoms include: Missing required fields such as source_id or relevance_score. Incorrect delimiters (e.g., using ; instead of the mandated ,). Citation blocks appearing outside the citations array or after the final … Read more

ChromaDB multi-region replication causing RAG prompt placeholder missing

by
photo of computer cables

Problem When ChromaDB is deployed with multi‑region replication, Retrieval‑Augmented Generation (RAG) prompts occasionally render with the placeholder {{retrieved_text}} left untouched. The generated output contains the literal placeholder instead of the expected document snippets, causing downstream language model calls to fail or produce nonsensical answers. Typical symptom in the application logs: 2024-10-08 14:22:31,842 ERROR rag_engine – … Read more

vLLM RAG hybrid search weight imbalance on edge node after config change

by
A man with styled hair wearing a white t-shirt with red lettering

Problem After a recent configuration change on an edge‑computing node running vLLM, the Retrieval‑Augmented Generation (RAG) hybrid search started to favor one modality almost exclusively. In practice: Keyword‑based retrieval (bm25) returns no results even when the query contains exact terms. Dense vector retrieval dominates the relevance score, causing unrelated passages to be selected. Latency spikes … Read more

Claude RAG returns empty answer despite relevant vector retrieval

by
Light brown background with partially visible

Problem: Claude Returns Empty or Irrelevant Answers Despite Relevant Vector Retrieval In a development sandbox we integrate Anthropic Claude via its API with a local FAISS vector store. The retrieval step consistently returns passages that contain the answer, but the final response from Claude is either an empty string or a generic answer that does … Read more