For kubernetes gpu platform and sre leads

Link Kubernetes pod restarts directly to underlying Xid 79 or NVLink hardware faults.

Align Kubelet eviction events, DCGM health exporter alerts, and kernel Xid codes so your team knows whether to reschedule onto a healthy node or debug container OOMs.

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Replay a resolved CoreWeave GPU pod eviction incident

Upload your log file. Review the selected evidence and masking, then run diagnosis. Keep the original log for any follow-up questions.

Before uploading, review cloud data handling and local options.

training_logs.txt

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Upload your log file. Large files are processed in your browser. Only selected evidence is submitted when you run diagnosis.

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No credit card. No automatic subscription. See whether Denpex helps with an incident you already understand.

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Up to 50 diagnoses a day for 30 days. Verify your work email to activate an eligible company evaluation, then replay a resolved incident and compare the evidence and next steps with your team's confirmed cause.

What a useful evaluation should establish

Isolate true physical GPU silicon/bus detachments from standard memory pressure evictions to prevent pointless pod restart loops on damaged nodes.

Use Denpex alongside your existing telemetry tools to investigate submitted incident evidence. With monitoring configured on a supported plan, detected failures can trigger alerts and an automatic diagnosis from the captured evidence.

Inside Denpex

See the evidence, not just the claim

Follow the causal chain, inspect the quoted evidence and prepare the next handoff. These actual product captures use founder-account examples and the VS Code extension, with the source identified under each image. Open a capture to inspect it at full size.

Denpex founder-account example: a causal graph connects an Xid 48 ECC event to a rank exit and downstream collective failures, with quoted evidence for each stage. — Live founder-account capture from the bundled NCCL/ECC example. Follow the hardware event, rank exit and downstream symptoms with a supporting log quote at each stage.Inspect original image

Denpex hardware handoff summary asks the operator to capture diagnostic evidence and verify RMA eligibility with the vendor. — Actual hardware handoff summary from the same founder-account example. Capture diagnostic evidence before an approved reset, then confirm RMA eligibility with the vendor.Inspect original image

Denpex historical example says a collective timeout does not establish the initiating rank, cause or failure domain and requests distinguishing evidence before a remedy. — Founder-account example restored from history. The original timeout remains unattributed, and the UI keeps the missing-evidence assessment visible.Inspect original image

Denpex VS Code extension displaying a bundled OOM-before-NCCL example, matched log evidence, verification guidance and an investigation handoff. — Actual VS Code extension capture of the bundled OOM-before-NCCL example. Review matched log evidence, verification guidance and the investigation handoff without leaving the editor.Inspect original image

Failure Signature Triage

CoreWeave - Observed Runtime Evidence

Read CoreWeave documentation

Incident pattern summary

A 64-GPU training job on CoreWeave abruptly loses Rank 42, triggering a cascade of NCCL remote peer aborted errors across the remaining 63 ranks. Correlating node telemetry shows Rank 42 hit Xid 79 (GPU has fallen off the bus) 300ms before the container exited with code 137.

Terminal traceback excerpt (CoreWeave)

kernel: [84920.114892] NVRM: GPU at PCI:0000:c1:00: GPU-4a81b920-112c-98a1-b012-99182736451a
kernel: [84920.114898] NVRM: Xid (PCI:0000:c1:00): 79, pid=19482, name=pt_main_thread, GPU has fallen off the bus.
cw-h100-node-11:19482:19510 [5] NCCL WARN Cuda failure 700 'an illegal memory access was encountered'

Recommended verification flags

Set these environment flags in your training container or launch script to capture high-resolution collective logs:

NCCL_DEBUG=INFOTORCH_NCCL_ASYNC_ERROR_HANDLING=1CUDA_DEVICE_ORDER=PCI_BUS_ID

Diagnostic Scope Boundary

Denpex cannot cordon CoreWeave Kubernetes nodes or trigger automated RMA workflows directly in your cluster. The evaluation produces clean root-cause attribution separating fatal GPU hardware faults from application crashes.