chromadb

ChromaDB multi-region replication causing RAG prompt placeholder missing

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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

Sandbox cannot resolve ChromaDB host DNS during vector store init

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Problem During development in a sandbox environment the application fails to initialise the ChromaDB vector store. The client library throws a DNS resolution error and aborts before any HTTP request is sent. Observed log excerpt: 2026-10-07 14:22:31,842 ERROR chromadb.client – Failed to resolve host ‘chroma-db.internal.svc.cluster.local’: Name or service not known Traceback (most recent call last): … Read more

ChromaDB streaming response drops under high concurrency in production

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Problem – Intermittent Streaming Response Drops in ChromaDB Under High Concurrency In a production environment that serves dozens of simultaneous query calls with stream=True, operators observed that the response stream terminates prematurely. Clients receive only a subset of the expected result chunks, leading to incomplete search results and downstream processing errors. Typical symptoms: HTTP/2 or … Read more

ChromaDB slice endpoint returning stale data on A100 GPU cluster

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ChromaDB Slice Endpoint Returning Stale Data on an A100/H100 GPU Cluster Problem Description (Symptoms and Impact) When querying the /slice endpoint on a multi‑node GPU cluster (A100 or H100), the response contains embeddings that were present before a recent bulk upsert. The stale data persists for several minutes, causing downstream model inference to drift and … Read more

ChromaDB RAG query decomposition error during multi‑GPU training

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Problem – RAG query decomposition failures in a multi‑GPU training pipeline When scaling a Retrieval‑Augmented Generation (RAG) workflow to multiple GPUs, engineers observed that chroma_client.query calls intermittently returned malformed or empty sub‑queries. The downstream LLM received no context, leading to generation failures or hallucinations. Typical error messages included: ValueError: Query decomposition returned an empty list … Read more

ChromaDB IAM permission denied on collections during rolling update

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Problem Description During a Kubernetes rolling update of a production ChromaDB deployment, operators observed a burst of PermissionDenied errors when the newly started pods attempted to read existing collections. Typical log entries look like: 2024-07-12T14:23:07Z ERROR PermissionDenied: User does not have permission to access collection 7f9c2a3b 2024-07-12T14:23:07Z ERROR 403 Forbidden: IAM role arn:aws:iam::123456789012:role/chroma-db-read lacks chroma.collections.read … Read more

ChromaDB stop sequence trigger failure in development sandbox

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Problem – Stop Sequence Trigger Failure in Development Sandbox Engineers using ChromaDB in a Docker‑based development sandbox report that the stop_sequences parameter supplied to query or generation calls is ignored. The symptom manifests as: Unbounded text generation that eventually exhausts container memory (OOM). Log entries such as: ERROR: StopSequenceError – Expected stop token not found … Read more

ChromaDB OOM error during high-throughput vector insertion benchmarking

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Problem: OOM Errors During High‑Throughput Vector Insertion Benchmarking When benchmarking ChromaDB on a single‑node VM (16 GB RAM, 8 vCPU) with 10 M+ 768‑dimensional embeddings, the Python process is terminated by the kernel after a few gigabytes of RSS growth. Typical failure messages observed include: MemoryError: Unable to allocate 1.2 GiB sqlite3.OperationalError: database or disk is full OSError: … Read more

ChromaDB token refresh failure during live data ingestion

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Problem: ChromaDB Token Refresh Failure During Live Data Ingestion In a production streaming pipeline that continuously upserts embedded documents into a hosted ChromaDB instance, the following symptoms were observed after roughly one hour of operation: WebSocket connections dropped with connection closed with code 4001 (authentication_failed). HTTP 401 Unauthorized responses on /upsert and /add endpoints, e.g.: … Read more

ChromaDB batch ingestion failure with 504 Gateway Timeout in Kubernetes

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Problem – Intermittent Batch Ingestion Failures in ChromaDB When a dedicated ingestion service streams large Kafka batches to the ChromaDB /api/v1/ingest endpoint, the operation fails with two distinct symptoms: ERROR – client: Connection reset by peer (errno 104) while sending batch upsert request. 504 Gateway Timeout – upstream request timed out (nginx ingress) while processing … Read more