Engineering Logs for Troubleshooting & Debugging
Problem – SSL/TLS Handshake Failure When Calling Anthropic Claude API Our cloud‑managed service attempts to invoke the Anthropic Claude API over HTTPS. After a scheduled TLS certificate rotation on the Anthropic side, all outbound requests started failing with a handshake error. The failure manifested as immediate connection aborts, no data returned, and a surge in … Read more
Problem: Index Rebuild Failure During Inference Leads to Request Timeouts In a production inference service powered by Google Gemini, real‑time prediction requests began experiencing latency spikes that quickly escalated into complete request timeouts. The service logs showed repeated failures of the internal vector index rebuild step that Gemini performs on‑the‑fly when new embeddings are added … Read more
Problem – Symptom Overview After migrating the Qwen inference workload to a hybrid cloud topology (on‑premises servers + public‑cloud VMs), API calls to the Qwen service began returning HTTP 401/403 errors. The errors are intermittent on the cloud side but consistent on‑premises. Example response payloads: { “error”: “invalid_token”, “error_description”: “The access token expired or is malformed.” … Read more
Problem During a multi‑GPU Distributed Data Parallel (DDP) fine‑tuning run of a GPT‑4 based generator, the Retrieval‑Augmented Generation (RAG) pipeline started returning irrelevant documents and the generated answers degraded noticeably. The root symptom was an embedding dimension mismatch between the vector store used for retrieval and the embedding model that was implicitly selected during the … Read more
Problem When a 48 kHz .wav file is uploaded to the Qwen transcription service running on a multi‑tenant Kubernetes cluster, the API either returns an empty transcription string or raises a ProcessingException. The issue appears only under load when the autoscaler creates new pods; lower‑sample‑rate files (16 kHz, 22.05 kHz) are processed correctly. Root Cause The Qwen model … Read more
Problem Developers attempting to call the OpenAI GPT‑4o API from a local development machine using SAML‑based Single Sign‑On receive the following error response: { “error”: { “code”: “invalid_saml_assertion”, “message”: “SAML assertion invalid” } } The failure occurs during the Authorization: Bearer <SAML‑assertion> step, preventing any API request from succeeding. Root Cause The OpenAI API validates … Read more
Problem During real‑time disaster recovery, the pipeline ingests high‑resolution satellite or aerial images (e.g., 8192×8192 pixels) and forwards them to the DeepSeek vision encoder. After a recent resolution increase, the service aborts with a token overflow error and produces incomplete image embeddings. The failure manifests as: Processing aborts after the first few layers of the … Read more
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
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
Problem: Gemini RAG pipeline cannot connect to the vector store after autoscaling The Gemini Retrieval‑Augmented Generation (RAG) pipeline is deployed on a managed cloud service that scales compute instances automatically. After a scale‑out event, the pipeline consistently fails to retrieve documents from the configured managed vector store. The failure manifests as connection timeouts and, intermittently, … Read more