Engineering Logs for Troubleshooting & Debugging
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 After upgrading the GPU nodes in the A100/H100‑based training cluster, DeepSeek training jobs are created but never start. The associated PersistentVolumeClaim (PVC) stays in the Pending phase indefinitely, preventing the pod from mounting the required dataset and model checkpoint storage. Root Cause The node upgrade introduced a change in the kubelet volumeBindingMode for the … Read more
Problem: DeepSeek streaming response cuts off during concurrent multi‑GPU training In a production node equipped with 4 × NVIDIA A100 GPUs, DeepSeek is used for two workloads: Fine‑tuning or continued pre‑training (torch.distributed, NCCL) Real‑time chat inference via the DeepSeek streaming API (stream=True) When a training job runs on any GPU while inference requests are served, the token‑by‑token … Read more
Problem Description When launching DeepSeek model instances simultaneously in us-east-1 and eu-west-2, the service reports a loading failure after exactly 30 seconds. The error appears in the application logs of every affected pod: ModelLoadingError: Timeout after 30000ms while fetching model file from remote storage. ConnectionError: Failed to download model checkpoint – request timed out (status code … Read more
Problem Description During a rolling deployment of DeepSeek on a 5‑node GKE cluster, API calls to /v1/collections started failing with a runtime exception. The failure manifested as: java.lang.RuntimeException: Failed to write collection to PostgreSQL at com.deepseek.service.CollectionService.create(CollectionService.java:112) Caused by: org.postgresql.util.PSQLException: Connection is closed at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:247) Additional logs showed HikariCP pool timeouts: HikariPool-1 – Connection is not … Read more
Problem Description During large‑scale model evaluation runs, scripts that invoke the https://api.deepseek.com/v1/chat/completions endpoint start failing after a few seconds of sustained traffic. The most common error messages observed are: Error: connect ETIMEDOUT https://api.deepseek.com/v1/chat/completions HTTP 502 Bad Gateway – received from DeepSeek load balancer during peak load HTTP 504 Gateway Timeout – request exceeded server timeout … Read more
Problem Description Nightly integration tests for the DeepSeek search service started failing after the dense encoder was upgraded to v2.1. The regression suite validates that the top‑k ranking produced by the hybrid (dense + sparse) scorer is deterministic across builds. After the model update the following error appeared in the CI logs: HybridScoreMismatchError: dense_score=0.8423, sparse_score=0.2311, combined_score variance … Read more
Problem: DeepSeek token refresh failure in an isolated Docker container When a DeepSeek client runs inside a headless Docker container that uses an immutable filesystem, restricted network egress, and non‑root user permissions, the automatic OAuth2 token refresh cycle stops working after the first access token expires. Subsequent inference requests receive HTTP 401 Unauthorized responses, and the … Read more
Problem Description During peak traffic periods the DeepSeek POST /v1/collections endpoint returns intermittent HTTP 500 responses. The failures manifest as timeouts and generic error bodies such as: HTTP/1.1 500 Internal Server Error Content-Type: application/json { “error”: “Internal Server Error: collection creation failed” } Observed symptoms include: Spike in ERROR – CreateCollection – Timeout after 30s log … Read more