haystack

Haystack inference queue backlog during CI/CD pipeline execution

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Problem – Inference Queue Backlog During CI/CD Pipeline Execution Symptoms and Impact During automated testing and deployment steps, Haystack inference calls start to time out. Typical log excerpts look like: 2024-08-24 12:03:45,212 [celery.worker] ERROR QueueFullError: Inference queue is full (maxsize=100) 2024-08-24 12:03:48,019 [haystack.client] ERROR TimeoutError: Inference request timed out after 30 seconds 2024-08-24 12:04:01,877 [celery.worker] … Read more

Haystack pipeline worker timeout during heavy document ingestion

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Problem Description The Haystack /document_ingestion endpoint returns a 504 Gateway Timeout when ingesting large batches of documents under load. The orchestrator logs show: Orchestrator log: Job 42 terminated due to timeout (504 Gateway Timeout) TaskTimeoutError: Task exceeded time limit of 300 seconds worker_1 | celery.exceptions.SoftTimeLimitExceeded ERROR haystack.pipeline.base: Execution exceeded max_execution_time Typical impact: Batch indexing jobs … Read more

Haystack scheduler pod placement failure due to insufficient GPU

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Problem Description In a Haystack deployment that runs multi‑GPU training jobs, the scheduler pod remains Pending with events such as: 0/5 nodes are available: 5 Insufficient gpu or FailedScheduling: pod has unschedulable: no nodes match node selector These failures prevent the haystack-scheduler from launching training workers, effectively blocking any multi‑GPU training pipeline. Root Cause Analysis … Read more

Haystack text generation ignoring stop sequences in Kubernetes

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Problem Description In a Kubernetes‑deployed Haystack microservice stack, the generate endpoint returns text that continues past the user‑specified stop sequence. The symptom is observable both in API responses and in logs such as: GenerationError: stop token not found in generated sequence – stop=’\nAnswer:’ Traceback (most recent call last): File “/app/pipelines/generation.py”, line 112, in _run_generation generated … Read more

Haystack audio processing fails with empty document metadata

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Haystack Audio Processing Fails with Empty Document Metadata Problem Description During document ingestion, audio files are passed through the AudioDocumentConverter and Speech2Text nodes but the resulting Document.text field is empty and the metadata columns in PostgreSQL contain NULL or truncated values. The pipeline completes without raising an exception, yet the indexed documents contain no transcription … Read more

Haystack SSL/TLS handshake failure with self-signed certificates

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Problem – Haystack TLS Handshake Fails in a Local Development Sandbox When running a multi‑service Haystack stack with Docker Compose, the inter‑node RPC layer aborts with TLS errors such as: SSLHandshakeException: certificate verify failed (self signed certificate in certificate chain) javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated OpenSSL error: verify error:num=20:unable to get local issuer certificate HaystackNodeError: TLS … Read more

Haystack DocumentRetriever context window overflow with long documents

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Problem – Context Window Overflow When Using Haystack DocumentRetriever In a production data pipeline that ingests long technical reports (PDFs, Word docs, etc.), the DocumentRetriever backed by ElasticsearchDocumentStore returns whole document sections that exceed the token limit of downstream LLMs. The pipeline aborts with errors such as: Token limit exceeded: 8192 tokens (max 4096) ElasticsearchDocumentStoreError: Document … Read more

Haystack ConfigMap mount error in multi-region Kubernetes deployment

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Problem – ConfigMap/Secret Mount Errors in a Multi‑Region Haystack Deployment In a production Haystack deployment spanning multiple AWS regions, pods repeatedly fail during initialization with messages such as: Error: “failed to sync config: open /etc/haystack/config.yaml: no such file or directory” MountVolume.SetUp failed for volume “config” : hostPath type check failed: path /etc/haystack does not exist … Read more

Haystack query decomposition error with FAISS index on A100 GPU

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Problem Description In a distributed Retrieval‑Augmented Generation (RAG) pipeline built with Haystack 1.19.x, the query_decomposition step crashes when the FAISS index is placed on an A100/H100 GPU. Typical error messages observed in the logs are: Traceback (most recent call last): File “…/haystack/pipeline/pipeline.py”, line 312, in run results = component.run(**inputs) File “…/haystack/nodes/retriever/faiss.py”, line 421, in run … Read more