fix(core): await queued processTask promises before cache.getBatch

[FrozenPandaz]

Current Behavior

Nx Cloud agents crash on warm-cache runs with:

Error: Failed to convert JavaScript value `Null` into rust type `String`
    at DbCache.getBatch (.../cache.js:115:41)
    at TaskOrchestrator.fetchCacheHits (.../task-orchestrator.js:270:47)
    at TaskOrchestrator.resolveCachedTasks (.../task-orchestrator.js:564:38)
    at runDiscreteTasks (.../init-tasks-runner.js:133:42)
  code: 'StringExpected'

Regression introduced by #35172 (warm-cache perf optimization). Cloud agents call runDiscreteTasks with task.hash = null (they intentionally null hashes — see ocean/.../execute-tasks-v3.ts). init-tasks-runner.ts::createOrchestrator queues processTask promises via fire-and-forget processAllScheduledTasks(), but runDiscreteTasks immediately calls resolveCachedTasks which doesn't await them. cache.getBatch(tasks.map(t => t.hash)) then receives nulls and the napi binding rejects them.

Expected Behavior

resolveCachedTasks awaits the queued processTask promises (which set task.hash via hashTask) before passing hashes into cache.getBatch.

The single-task runTaskDirectly path already awaits this.processedTasks.get(task.id) for the same reason — this fix mirrors that pattern in the bulk path.

Bonus: a second tiny commit changes coordinator step 1's pre-hash guard from unhashed.length > 1 to > 0. The > 1 micro-optimization silently skipped cache lookup for single-task cycles, because resolveCachedTasksBulk filters candidates by task.hash && — a length-1 unhashed task got dropped and ran without a cache check. Cost more in lost cache hits than it saved in batch setup.

Related Issue(s)

Surfaced internally; no GitHub issue.

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☁️ Nx Cloud last updated this comment at 2026-04-17 13:34:17 UTC

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