feat: prototype allocator-level OOM circuit breaker (OomGuard)#4582

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andygrove wants to merge 15 commits into

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andygrove:oom-guard-circuit-breaker

Commits on Jun 3, 2026

feat: add oom-guard feature and accounting helpers
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refactor: feature-gate oom_guard module and harden should_trip
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feat: oom-guard process globals, arming, and enforcement
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feat: wrap global allocator with AccountingAllocator under oom-guard
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docs: document oom-guard allocator reentrancy and cast safety
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feat: stamp query-worker threads and arm oom-guard from config
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refactor: name memoryGuard config keys and warn on zero limit
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feat: map OomGuardPanic to ResourcesExhausted at JNI boundaries
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refactor: share oom-guard error message and harden panic recovery
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feat: register spark.comet.exec.memoryGuard configs
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docs: clarify memoryGuard config descriptions
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test: oom-guard trips on a real over-budget allocation
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fix: map OomGuardPanic on the spawned-path consumer thread
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refactor: consolidate oom-guard panic mapping and simplify allocator cfg
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fix: avoid realloc use-after-free and serialize guard panics in OomGuard [skip ci]
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