[TRTLLMINF-311][infra] Infra-scoped fail-fast: defer K8s infra aborts instead of cascading - #17615
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… instead of cascading Today a K8s infra abort (e.g. KubernetesClientTimeoutException pod-launch timeout) in one architecture's test sub-job trips fail-fast and SIGTERMs the healthy sibling architecture, wasting its GPU work. This scopes fail-fast to genuine failures. Inner layer (L0_Test.groovy): runBranchesWithInfraDefer wraps each parallel branch so a post-retry failure classified as a positive K8s infra abort (FailureClassifier.isDeferrableInfra) is recorded and swallowed -- siblings keep running -- while a real test/build failure (or interrupt) is rethrown unchanged, so fail-fast stays active for real failures. A sub-job that saw only infra aborts resolves to UNSTABLE (coverage incomplete, not a failure). Gated on ENABLE_INFRA_SCOPED_FAILFAST (kill switch); SLURM-scoped aborts keep today's fail-fast for now. Parent layer (L0_MergeRequest.groovy): launchJob treats a downstream UNSTABLE result as non-fatal (do not throw -> do not cancel the sibling arch), marking the build UNSTABLE. The per-arch multi-GPU gates skip (pre-merge) or keep running (post-merge) on an infra-incomplete single-GPU run without escalating to FAILURE. Requires trtllm-jenkins-shared-lib isDeferrableInfra (separate MR). Signed-off-by: Brian Nguyen <brnguyen@nvidia.com>
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WalkthroughJenkins pipelines now defer classified Kubernetes infrastructure failures, mark affected jobs ChangesInfra-scoped Jenkins execution
Estimated code review effort: 4 (Complex) | ~45 minutes Mergeability Score: 🟡 Moderate · up to The current revision still injects a synthetic infrastructure failure into SBSA jobs, which can mark otherwise passing work UNSTABLE, and it still references a temporary shared-library branch. These merge-preparation issues must be fixed before the change is ready to merge. Sequence Diagram(s)sequenceDiagram
participant L0_Test
participant runBranchesWithInfraDefer
participant KubernetesInfrastructure
participant SiblingBranches
L0_Test->>runBranchesWithInfraDefer: run GPU branches
runBranchesWithInfraDefer->>KubernetesInfrastructure: execute branch
KubernetesInfrastructure-->>runBranchesWithInfraDefer: return classified infrastructure abort
runBranchesWithInfraDefer->>SiblingBranches: continue execution
runBranchesWithInfraDefer-->>L0_Test: mark infra-only result UNSTABLE
sequenceDiagram
participant L0_MergeRequest
participant launchJob
participant SingleGPUJob
participant MultiGPUStage
L0_MergeRequest->>launchJob: launch single-GPU job
launchJob->>SingleGPUJob: execute test
SingleGPUJob-->>launchJob: return UNSTABLE
launchJob-->>L0_MergeRequest: record infra-incomplete status
L0_MergeRequest->>MultiGPUStage: skip pre-merge stage or continue post-merge stage
Possibly related PRs
Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@jenkins/L0_Test.groovy`:
- Line 17: Replace the temporary trtllm-jenkins-shared-lib branch reference with
the released reference in the `@Library` declarations of jenkins/L0_Test.groovy
(17-17), jenkins/Build.groovy (17-17), jenkins/BuildDockerImage.groovy (17-17),
jenkins/L0_MergeRequest.groovy (17-17), jenkins/TensorRT_LLM_PLC.groovy (1-1),
jenkins/UpdateTestDurations.groovy (16-16), and
jenkins/runPerfSanityTriage.groovy (1-1); leave the bloom shared-library
reference unchanged.
In `@jenkins/TensorRT_LLM_PLC.groovy`:
- Line 1: Add the standard NVIDIA copyright and Apache-2.0 headers with year
2026 before the `@Library` declaration in jenkins/TensorRT_LLM_PLC.groovy lines
1-1 and jenkins/runPerfSanityTriage.groovy lines 1-1; no other changes are
needed.
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Inline comments:
In `@jenkins/runPerfSanityTriage.groovy`:
- Line 17: Update the `@Library` declaration in runPerfSanityTriage.groovy to
remove the temporary user/brnguyen/infra-scoped-failfast branch and reference
the stable trtllm-jenkins-shared-lib version instead.
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- jenkins/TensorRT_LLM_PLC.groovy
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Signed-off-by: Brian Nguyen <brnguyen@nvidia.com>
Signed-off-by: Brian Nguyen <brnguyen@nvidia.com>
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Inline comments:
In `@jenkins/L0_Test.groovy`:
- Around line 6585-6605: Remove the temporary synthetic infrastructure-failure
injection block guarded by the SBSA single-GPU condition, including its injected
job definition and validation echo. Preserve the original singleGpuJobs flow and
all real stages unchanged.
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🚧 Files skipped from review as they are similar to previous changes (1)
- jenkins/runPerfSanityTriage.groovy
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/bot run --stage-list "DGX_H100-2_GPUs-PyTorch-Others-1" |
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/bot skip --comment "Jenkins-only change, feature-gated by ENABLE_INFRA_SCOPED_FAILFAST. Full run 66105 on this commit: all single-GPU test stages green on both arches (x86 216/216, SBSA 26/26). Its multi-GPU failure was a SLURM SSH outage (connection resets to the nsc-svg-slurm-1 head node across many B200 stages, zero test failures); the fail-fast cascade there is by design since SLURM scope keeps existing behavior. Multi-GPU code path re-validated green in run 66248 (DGX_H100-2_GPUs-PyTorch-Others-1). Defer mechanism validated end-to-end by instrumented run 66076 (injected synthetic K8s abort deferred, siblings continued, pipeline UNSTABLE not FAILURE). Decision logic unit-tested in trtllm-jenkins-shared-lib MR 93 (merged)." |
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3 participants
What & why
Today a K8s infra abort in one CPU architecture's test sub-job (e.g. a
KubernetesClientTimeoutExceptionpod-launch/scheduling timeout) trips Jenkinsfail-fast and SIGTERMs the healthy sibling architecture's sub-job, throwing
away its green GPU work. Over a recent 2-week window, infra-driven fail-fast
cascades accounted for ~17 recoverable pipeline losses; this change scopes
fail-fast so only genuine failures cancel siblings.
How
Inner layer —
jenkins/L0_Test.groovyrunBranchesWithInfraDeferwraps each parallel branch: a post-retry failureclassified as a positive K8s infra abort (
FailureClassifier.isDeferrableInfra)is recorded and swallowed so sibling branches keep running; a real test/build
failure (or an interrupt) is rethrown unchanged, so fail-fast stays fully active
for real failures.
UNSTABLE(coverage incomplete, not a failure).ENABLE_INFRA_SCOPED_FAILFAST(kill switch). SLURM-scoped aborts keeptoday's fail-fast for now — the seam is scope-parameterised so extending to
SLURM is a later scope-threading change, not a redesign.
Parent layer —
jenkins/L0_MergeRequest.groovylaunchJobtreats a downstreamUNSTABLEresult as non-fatal (does not throw →does not cancel the sibling arch), marking the build
UNSTABLE.infra-incomplete single-GPU run, without escalating to
FAILURE.Dependency & merge order
trtllm-jenkins-shared-libisDeferrableInfra— landed viaftp/infra/trtllm-jenkins-shared-lib!93
(merged). All
@Libraryreferences in this PR point at@main; the temporarybranch repoint used during development has been dropped.
Testing
isDeferrableInfradecision logic(K8s-defer / real-rethrow / interrupt-never-defer / SLURM-scope gating).
--skip-testwith a throwaway commit injecting a synthetic
KubernetesClientTimeoutExceptionabort into the SBSA single-GPU sub-job): abort classified deferrable and swallowed
(
[INFRA-DEFER]logged), sibling sanity stages kept running, SBSA sub-job andpipeline resolved
UNSTABLE(notFAILURE), x86 sub-job untouched.single-GPU test stages green on both arches (x86 216/216, SBSA 26/26) — the
wrapper is transparent on the happy path. The run's multi-GPU failure was a
SLURM-side SSH outage (connection resets to the
nsc-svg-slurm-1head nodeacross many DGX_B200 stages, zero test failures); it correctly rethrew and
fail-fast cancelled siblings, demonstrating in-pipeline that non-deferred
failures keep today's behavior (SLURM scope is intentionally not deferred yet).
DGX_H100-2_GPUs-PyTorch-Others-1green, exercising thedgxJobswrapping.(the exception is caught outside the stage); the visible traces are the
[INFRA-DEFER]log line and the sub-job'sUNSTABLEresult.Dev Engineer Review
L0_Test.groovyaddsENABLE_INFRA_SCOPED_FAILFASTand defers only classified Kubernetes infrastructure aborts.UNSTABLE.L0_MergeRequest.groovypropagates downstreamUNSTABLEresults without cancelling sibling architectures.isDeferrableInfrafunction.QA Engineer Review
No test changes.