Execution Lifecycle

State Transitions

QUEUED ──> ASSIGNED ──> RUNNING ──> COMPLETED
  |            |            |
  v            v            v
FAILED      FAILED       FAILED
                            |
                            v
                         STOPPED

Stale Execution Handling

A background job runs periodically to detect stale executions:

Condition	Action
QUEUED, no runner available within the configured window	Mark FAILED
ASSIGNED, runner OFFLINE past the grace window	Re-queue once, then FAILED
RUNNING, runner OFFLINE past the grace window	Mark FAILED

Performance Metrics

Each execution records CPU average/peak and memory average/peak, sampled on the runner and included in the final status report.

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