[TRTLLMINF-320][infra] Extend infra-scoped fail-fast deferral to SLURM-scoped aborts - #17938
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Phase 1 (NVIDIA#17615, TRTLLMINF-311) deferred only K8s-scoped infra aborts: runBranchesWithInfraDefer classified every branch under InfraFailure.K8S, so a SLURM-scoped abort (SSH outage to a head node, slurm_track ssh exit 255, monitor loss while the job is still active) did not match, kept today's failFast, and SIGTERMed healthy sibling-architecture branches. Live specimen: L0_MergeRequest_PR #53782 (2026-08-14), an SSH outage to a SLURM frontend hit many DGX_B200 stages; the first to resolve rethrew and fail-fast cancelled every sibling DGX branch (exit 143), including healthy in-flight H100 stages, with zero test failures. Thread each branch's real execution scope through the existing seam. launchTestJobs builds a per-stage scope map from opts.slurmDispatcher (the authoritative SLURM-dispatch signal, same flag runKubernetesPodWithInfraRetry uses) and passes it to runBranchesWithInfraDefer. Every branch is still checked under K8S -- unchanged for non-SLURM stages, and it keeps K8s-pod aborts of a SLURM dispatcher pod deferrable exactly as in phase 1. SLURM dispatcher stages are additionally checked under SLURM, so their infra aborts defer (record + swallow -> UNSTABLE) instead of cascading. Scope-threading only, not a redesign; the deferral machinery, UNSTABLE resolution, and parent-layer non-fatal handling from NVIDIA#17615 are reused unchanged. The inner SLURM retry (runLLMTestlistOnSlurm) is already exhausted before the branch body returns, so deferral stays post-retry, mirroring the K8s path. When every branch in a group infra-aborts, a distinct log line flags a suspected cluster-wide / shared-frontend outage. ENABLE_INFRA_SCOPED_FAILFAST=false still restores the original behavior. Signed-off-by: Brian Nguyen <brnguyen@nvidia.com>
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Included review availability: Your plan provides up to 12 included reviews per hour; 10 remain after this review. WalkthroughJenkins fail-fast handling now supports Kubernetes and SLURM infrastructure scopes. Stage scope metadata flows through job launch and parallel execution paths. Deferrable infrastructure failures are swallowed, sibling branches continue, and all-infrastructure-aborted groups are marked unstable. ChangesInfrastructure-scoped branch execution
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The BuildDockerImageSanityTest path may fail before its branches execute because the new stage scope map is not initialized there, making the PR not merge-ready until this path is fixed or explicitly accepted by the owner. Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant launchTestJobs
participant runBranchesWithInfraDefer
participant BranchWrapper
participant ParallelBranches
launchTestJobs->>runBranchesWithInfraDefer: pass stageInfraScope
runBranchesWithInfraDefer->>BranchWrapper: execute scoped branch
BranchWrapper->>runBranchesWithInfraDefer: report K8s or SLURM failure
runBranchesWithInfraDefer->>ParallelBranches: continue sibling branches
ParallelBranches-->>runBranchesWithInfraDefer: return branch outcomes
🚥 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`:
- Around line 6616-6625: Initialize stageInfraScope to an empty map before the
launcher branch so both launchTestJobs and launchTestJobsForImagesSanityCheck
define it before the later scope lookups in BuildDockerImageSanityTest; preserve
the existing per-stage assignments for the regular path.
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jenkins/L0_Test.groovy
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Signed-off-by: Brian Nguyen <brnguyen@nvidia.com>
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/bot skip --comment "Happy-path qualified: builds + all x86_64/SBSA single-GPU stages passed, confirming the change does not break the normal pipeline. This is an additive, fail-safe change to the abort-classification path scoped to infra/SLURM aborts — if the infra-scoped deferral does not fire, behavior falls back to the pre-existing cascading abort, so worst case is degraded-not-regressed with no impact on test-failure aborts. Multi-GPU coverage is not needed to qualify this infra-scoped fail-fast change." |
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3 participants
Summary
Extends the infra-scoped fail-fast deferral added in #17615 (TRTLLMINF-311)
to SLURM-scoped infra aborts. Ticket: TRTLLMINF-320.
Phase 1 deferred only K8s-scoped infra aborts:
runBranchesWithInfraDeferclassified every parallel branch under
InfraFailure.K8S, so a SLURM-scopedabort (SSH outage to a head node,
slurm_track.shssh exit 255, monitor/agentloss while the SLURM job is still active) did not match. It kept today's
failFastand SIGTERMed healthy sibling-architecture branches.Failure mode: an SSH outage to a SLURM frontend (
kex_exchange_identification: Connection reset,slurm_track.shssh exit 255) can hit manyDGX_B200stages atonce; the first to resolve rethrows, and fail-fast then cancels every sibling DGX
branch (exit 143) including healthy in-flight H100 stages, with zero test failures.
Change (scope-threading, not a redesign)
Single file:
jenkins/L0_Test.groovy.launchTestJobsbuilds a per-stage execution-scope map (stageInfraScope)keyed by stage name, at the point where the parallel-jobs config tuple's
opts(3rd element) is still visible.
opts.slurmDispatcher— the same authoritativeSLURM-dispatch flag
runKubernetesPodWithInfraRetryalready uses — selectsInfraFailure.SLURM; every other stage isInfraFailure.K8S.runBranchesWithInfraDefer(Map jobs, boolean failFast, Map stageScopes = [:])takes the scope map and, per branch, still checks
isDeferrableInfra(e, K8S)(unchanged for non-SLURM stages, and this keeps K8s-pod aborts of a SLURM
dispatcher pod deferrable exactly as in phase 1) and additionally checks
isDeferrableInfra(e, SLURM)for SLURM dispatcher stages. A match records +swallows the abort so siblings keep running; the sub-job resolves to
UNSTABLE.stageInfraScopethrough. Stages absent from the mapdefault to K8S-only (phase-1 behavior). Comments on the master switch and the
function are updated.
The deferral machinery,
UNSTABLEresolution, and the parent-layer non-fatalhandling in
L0_MergeRequest.launchJoball landed with #17615 and are reusedunchanged — the parent keys purely off the
UNSTABLEbuild status, which isscope-agnostic, so SLURM deferral flows through it identically. No changes to
L0_MergeRequest.groovy,TensorRT_LLM_PLC.groovy, orrunPerfSanityTriage.groovy.Care points
runLLMTestlistOnSlurm,singleAttemptbypass) — defer applies POST-retry only. Handled byconstruction: deferral wraps the outermost branch body, which returns only after
the inner SLURM retry loop is exhausted. For SLURM (
singleAttempt:true) stages,runKubernetesPodWithInfraRetryrethrows the original exception once therunner has started, so the typed SLURM
InfraFailure(or the raw ssh-signatureblob) reaches the branch layer intact. Same layering as the K8s path.
sweepOrphanedSlurmResourcesbackstop still reclaims deferred branches.No change needed. Deferral (catch + swallow) happens strictly above the SLURM
cleanup:
runLLMTestlistOnSlurm's ownfinally(cleanup +deregisterSlurmResource)runs as the exception unwinds before it reaches
runBranchesWithInfraDefer, andthe post-build
sweepOrphanedSlurmResourcesin thefinallyremains unconditional.handled: when every branch in a group infra-aborts, a distinct log line flags a
suspected cluster-wide / shared-frontend outage. A prospective short-circuit that
cancels healthy siblings the moment a quorum aborts is deliberately deferred —
it would reintroduce the cross-branch SIGTERM cascade this seam removes, and
detecting "all will be infra" before the branches finish is not cleanly doable at
this layer. Tracked as a follow-up.
Shared-lib (classifier) — no MR required
The shared-lib
FailureClassifier(GitLab, separate repo) already classifies theSLURM specimen at
InfraFailure.SLURMscope, so this TRT-LLM change is functionalstandalone and no shared-lib MR is needed. Details available on request.
Testing
Groovy pipeline logic can't be executed locally (no Jenkins). Verified by:
mirror-symmetry review against the #17615 K8s path; confirming
ENABLE_INFRA_SCOPED_FAILFAST=falserestores the exact prior behavior (earlyreturn, plain
failFast+parallel); confirming deferral is post-retry;brace/scope balance review of the edited regions. CI triggered via
/bot run.Dev Engineer Review
opts.slurmDispatcher.runBranchesWithInfraDeferwith an optionalstageScopesparameter.QA Engineer Review
No test changes.