Topic
LlamaIndex Testing & Debugging
13 posts on llamaindex testing & debugging — part of developer tools on the n4n AI blog.
Why LlamaIndex RAG apps return empty query results
Practical guide to LlamaIndex empty query results debugging: verify index contents, retriever output, metadata filters, and LLM calls to fix silent RAG failures.
Tracing LlamaIndex agent runs with OpenTelemetry
Step-by-step guide to tracing LlamaIndex agents with OpenTelemetry: instrument your agent, export spans, and debug multi-step LLM workflows.
Testing LlamaIndex node parsers for chunking bugs
A practical guide to testing LlamaIndex node parsers for chunking bugs, with pytest patterns and code to verify split boundaries and metadata.
Mocking LLM calls in LlamaIndex unit tests
Learn how to mock LLM calls in LlamaIndex tests with pytest and fakes. Step-by-step tutorial for fast, deterministic unit tests of RAG pipelines.
Logging LlamaIndex prompt and response pairs
A hands-on tutorial for logging LlamaIndex prompts and responses with custom callbacks. Capture LLM calls for debugging, evals, and cost tracking.
LlamaIndex testing tools compared: pytest to Ragas
A practical LlamaIndex testing tools comparison of pytest and Ragas across capabilities, cost, latency, ergonomics, and ecosystem, with a verdict per use case.
How to unit test LlamaIndex query engines
Practical guide to unit testing LlamaIndex query engines with mocked LLMs and embeddings, step-by-step pytest setup, and verifiable assertions.
Fixing LlamaIndex context window overflow errors
Step-by-step LlamaIndex context window overflow fix: debug, tune chunk sizes, trim retrieved nodes, compress context, and verify with token counts.
Evaluating LlamaIndex retrieval with faithfulness scores
A practical how-to guide for computing LlamaIndex faithfulness evaluation metrics on RAG pipelines, with runnable code and CI integration steps.
Debugging slow LlamaIndex queries with latency traces
A practical guide to LlamaIndex query latency debugging using OpenTelemetry traces, with code to instrument retrievers, LLMs, and nodes.
Debugging LlamaIndex vector store index mismatches
A practical guide to LlamaIndex vector store index debugging: trace embedding drift, schema mismatches, and metadata bugs in production RAG pipelines.
Debugging LlamaIndex retrieval pipelines step by step
Step-by-step tutorial on debugging LlamaIndex retrieval pipelines: instrument queries, inspect retrieved nodes, and resolve RAG failures with code.
Catching hallucinations in LlamaIndex responses
Step-by-step guide to detecting hallucinations in LlamaIndex RAG apps: instrument pipelines, run faithfulness evaluators, and build regression tests.
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