FAILURE MAP
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FA-34431 / Notification interfaces / Open access

Long-running notification progress: late-progress from complete · case 01

The late-progress event leaves a notification in running instead of complete.

Verified by executionVariant 1 · 39 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Late progress revives a completed notification.

THE FAILURE

Late progress revives a completed notification.

Unsuccessful approach: Requeueing from an older progress event creates phantom work.

Case contract

Long-running notification progress is a bounded visual-notification workflow with mutable policy state {'done': 3, 'total': 10, 'job': 2, 'paused_at': None}. Its default transition relation is {('queued', 'worker-start'): 'running', ('running', 'request-pause'): 'pause-pending', ('pause-pending', 'pause-accepted'): 'paused', ('pause-pending', 'pause-rejected'): 'running', ('paused', 'resume-click'): 'resume-pending', ('resume-pending', 'resume-accepted'): 'running', ('running', 'work-complete'): 'complete', ('running', 'work-failed'): 'failed', ('complete', 'late-progress'): 'complete', ('paused', 'work-complete'): 'complete'}; domain inputs can suppress or redirect transitions and update policy fields, as specified in solve. Different-generation events are inert. Batches apply in order. Optional observe returns the selected policy field alongside the phase.

Why this case matters

Visual notification lifecycle ordering can leave an inbox or toast showing the wrong actionable state even when transport succeeds.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('queued', 'worker-start'): 'running', ('running', 'request-pause'): 'pause-pending', ('pause-pending', 'pause-accepted'): 'paused', ('pause-pending', 'pause-rejected'): 'running', ('paused', 'resume-click'): 'resume-pending', ('resume-pending', 'resume-accepted'): 'running', ('running', 'work-complete'): 'complete', ('running', 'work-failed'): 'failed', ('complete', 'late-progress'): 'running', ('paused', 'work-complete'): 'complete'}
    data = json.loads(json.dumps({'done': 3, 'total': 10, 'job': 2, 'paused_at': None})) if payload is None else {**json.loads(json.dumps({'done': 3, 'total': 10, 'job': 2, 'paused_at': None})), **json.loads(json.dumps(payload))}
    state = initial
    for delivery in events:
        event, event_generation = delivery[:2]
        arg = delivery[2] if len(delivery) > 2 else {}
        if event_generation == generation:
            previous = state
            if event in ('work-complete','work-failed','late-progress') and arg.get('job',data['job']) != data['job']: event = 'unknown-event'
            if event == 'late-progress' and state != 'complete': data['done'] = min(data['total'],max(data['done'],arg.get('done',data['done'])))
            if event == 'work-complete' and 'done' in arg and arg['done'] < data['total']: event = 'unknown-event'
            state = table.get((state, event), state)
            if state == 'complete': data['done'] = data['total']
            if state == 'paused': data['paused_at'] = data['done']
            if state == 'running': data['paused_at'] = None
    return {'phase': state, 'value': data[observe]} if observe else state
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('queued / worker-start', solve('queued', [('worker-start', N)], N), 'running')
check('running / request-pause', solve('running', [('request-pause', N)], N), 'pause-pending')
check('pause-pending / pause-accepted', solve('pause-pending', [('pause-accepted', N)], N), 'paused')
check('pause-pending / pause-rejected', solve('pause-pending', [('pause-rejected', N)], N), 'running')
check('paused / resume-click', solve('paused', [('resume-click', N)], N), 'resume-pending')
check('resume-pending / resume-accepted', solve('resume-pending', [('resume-accepted', N)], N), 'running')
check('running / work-complete', solve('running', [('work-complete', N)], N), 'complete')
check('running / work-failed', solve('running', [('work-failed', N)], N), 'failed')
check('complete / late-progress', solve('complete', [('late-progress', N)], N), 'complete')
check('paused / work-complete', solve('paused', [('work-complete', N)], N), 'complete')
check('older notification incarnation', solve('queued', [('worker-start', N - 1)], N), 'queued')
check('future notification incarnation', solve('queued', [('worker-start', N + 1)], N), 'queued')
check('unknown event is inert', solve('queued', [('unknown-event', N)], N), 'queued')
check('empty delivery batch', solve('queued', [], N), 'queued')
check('N stale deliveries before current delivery', solve('queued', [('worker-start', N - 1)] * N + [('worker-start', N)], N), 'running')
check('trace worker-start then request-pause', solve('queued', [('worker-start', N), ('request-pause', N)], N), 'pause-pending')
check('trace worker-start then work-complete', solve('queued', [('worker-start', N), ('work-complete', N)], N), 'complete')
check('trace worker-start then work-failed', solve('queued', [('worker-start', N), ('work-failed', N)], N), 'failed')
check('trace request-pause then pause-accepted', solve('running', [('request-pause', N), ('pause-accepted', N)], N), 'paused')
check('trace request-pause then pause-rejected', solve('running', [('request-pause', N), ('pause-rejected', N)], N), 'running')
check('trace pause-accepted then resume-click', solve('pause-pending', [('pause-accepted', N), ('resume-click', N)], N), 'resume-pending')
check('trace pause-accepted then work-complete', solve('pause-pending', [('pause-accepted', N), ('work-complete', N)], N), 'complete')
check('trace pause-rejected then request-pause', solve('pause-pending', [('pause-rejected', N), ('request-pause', N)], N), 'pause-pending')
check('trace pause-rejected then work-complete', solve('pause-pending', [('pause-rejected', N), ('work-complete', N)], N), 'complete')
check('trace pause-rejected then work-failed', solve('pause-pending', [('pause-rejected', N), ('work-failed', N)], N), 'failed')
check('trace resume-click then resume-accepted', solve('paused', [('resume-click', N), ('resume-accepted', N)], N), 'running')
check('trace resume-accepted then request-pause', solve('resume-pending', [('resume-accepted', N), ('request-pause', N)], N), 'pause-pending')
check('trace resume-accepted then work-complete', solve('resume-pending', [('resume-accepted', N), ('work-complete', N)], N), 'complete')
check('trace resume-accepted then work-failed', solve('resume-pending', [('resume-accepted', N), ('work-failed', N)], N), 'failed')
check('trace work-complete then late-progress', solve('running', [('work-complete', N), ('late-progress', N)], N), 'complete')
check('trace late-progress then late-progress', solve('complete', [('late-progress', N), ('late-progress', N)], N), 'complete')
check('trace work-complete then late-progress', solve('paused', [('work-complete', N), ('late-progress', N)], N), 'complete')
check('domain state regression 1: done', solve('running', [('work-complete', N, {'job': 1})], N, {}, 'done'), {'phase': 'running', 'value': 3})
check('domain state regression 2: done', solve('running', [('work-complete', N, {'done': 9})], N, {}, 'done'), {'phase': 'running', 'value': 3})
check('domain state regression 3: done', solve('running', [('work-complete', N, {'done': 10})], N, {}, 'done'), {'phase': 'complete', 'value': 10})
check('domain state regression 4: paused_at', solve('pause-pending', [('pause-accepted', N, {})], N, {}, 'paused_at'), {'phase': 'paused', 'value': 3})
check('domain state regression 5: paused_at', solve('resume-pending', [('resume-accepted', N, {})], N, {'paused_at': 3}, 'paused_at'), {'phase': 'running', 'value': None})
check('domain state regression 6: done', solve('complete', [('late-progress', N, {'done': 2})], N, {'done': 10}, 'done'), {'phase': 'complete', 'value': 10})
check('domain state regression 7: done', solve('running', [('request-pause', N, {}), ('pause-accepted', N, {}), ('resume-click', N, {}), ('resume-accepted', N, {}), ('work-complete', N, {'done': 10})], N, {}, 'done'), {'phase': 'complete', 'value': 10})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
queued / worker-startrunningrunningPassed
running / request-pausepause-pendingpause-pendingPassed
pause-pending / pause-acceptedpausedpausedPassed
pause-pending / pause-rejectedrunningrunningPassed
paused / resume-clickresume-pendingresume-pendingPassed
resume-pending / resume-acceptedrunningrunningPassed
running / work-completecompletecompletePassed
running / work-failedfailedfailedPassed
complete / late-progressrunningcompleteFailed
paused / work-completecompletecompletePassed
older notification incarnationqueuedqueuedPassed
future notification incarnationqueuedqueuedPassed
unknown event is inertqueuedqueuedPassed
empty delivery batchqueuedqueuedPassed
N stale deliveries before current deliveryrunningrunningPassed
trace worker-start then request-pausepause-pendingpause-pendingPassed
trace worker-start then work-completecompletecompletePassed
trace worker-start then work-failedfailedfailedPassed
trace request-pause then pause-acceptedpausedpausedPassed
trace request-pause then pause-rejectedrunningrunningPassed
trace pause-accepted then resume-clickresume-pendingresume-pendingPassed
trace pause-accepted then work-completecompletecompletePassed
trace pause-rejected then request-pausepause-pendingpause-pendingPassed
trace pause-rejected then work-completecompletecompletePassed
trace pause-rejected then work-failedfailedfailedPassed
trace resume-click then resume-acceptedrunningrunningPassed
trace resume-accepted then request-pausepause-pendingpause-pendingPassed
trace resume-accepted then work-completecompletecompletePassed
trace resume-accepted then work-failedfailedfailedPassed
trace work-complete then late-progressrunningcompleteFailed
trace late-progress then late-progressrunningcompleteFailed
trace work-complete then late-progressrunningcompleteFailed
domain state regression 1: done{'phase': 'running', 'value': 3}{'phase': 'running', 'value': 3}Passed
domain state regression 2: done{'phase': 'running', 'value': 3}{'phase': 'running', 'value': 3}Passed
domain state regression 3: done{'phase': 'complete', 'value': 10}{'phase': 'complete', 'value': 10}Passed
domain state regression 4: paused_at{'phase': 'paused', 'value': 3}{'phase': 'paused', 'value': 3}Passed
domain state regression 5: paused_at{'phase': 'running', 'value': None}{'phase': 'running', 'value': None}Passed
domain state regression 6: done{'phase': 'running', 'value': 10}{'phase': 'complete', 'value': 10}Failed
domain state regression 7: done{'phase': 'complete', 'value': 10}{'phase': 'complete', 'value': 10}Passed

SHA-256 / 0960812d31dc7ca3c392558cdc39c60be14825072b7e4f761ebc9aec745e7973

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('queued', 'worker-start'): 'running', ('running', 'request-pause'): 'pause-pending', ('pause-pending', 'pause-accepted'): 'paused', ('pause-pending', 'pause-rejected'): 'running', ('paused', 'resume-click'): 'resume-pending', ('resume-pending', 'resume-accepted'): 'running', ('running', 'work-complete'): 'complete', ('running', 'work-failed'): 'failed', ('complete', 'late-progress'): 'queued', ('paused', 'work-complete'): 'complete'}
    data = json.loads(json.dumps({'done': 3, 'total': 10, 'job': 2, 'paused_at': None})) if payload is None else {**json.loads(json.dumps({'done': 3, 'total': 10, 'job': 2, 'paused_at': None})), **json.loads(json.dumps(payload))}
    state = initial
    for delivery in events:
        event, event_generation = delivery[:2]
        arg = delivery[2] if len(delivery) > 2 else {}
        if event_generation == generation:
            previous = state
            if event in ('work-complete','work-failed','late-progress') and arg.get('job',data['job']) != data['job']: event = 'unknown-event'
            if event == 'late-progress' and state != 'complete': data['done'] = min(data['total'],max(data['done'],arg.get('done',data['done'])))
            if event == 'work-complete' and 'done' in arg and arg['done'] < data['total']: event = 'unknown-event'
            state = table.get((state, event), state)
            if state == 'complete': data['done'] = data['total']
            if state == 'paused': data['paused_at'] = data['done']
            if state == 'running': data['paused_at'] = None
    return {'phase': state, 'value': data[observe]} if observe else state
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('queued / worker-start', solve('queued', [('worker-start', N)], N), 'running')
check('running / request-pause', solve('running', [('request-pause', N)], N), 'pause-pending')
check('pause-pending / pause-accepted', solve('pause-pending', [('pause-accepted', N)], N), 'paused')
check('pause-pending / pause-rejected', solve('pause-pending', [('pause-rejected', N)], N), 'running')
check('paused / resume-click', solve('paused', [('resume-click', N)], N), 'resume-pending')
check('resume-pending / resume-accepted', solve('resume-pending', [('resume-accepted', N)], N), 'running')
check('running / work-complete', solve('running', [('work-complete', N)], N), 'complete')
check('running / work-failed', solve('running', [('work-failed', N)], N), 'failed')
check('complete / late-progress', solve('complete', [('late-progress', N)], N), 'complete')
check('paused / work-complete', solve('paused', [('work-complete', N)], N), 'complete')
check('older notification incarnation', solve('queued', [('worker-start', N - 1)], N), 'queued')
check('future notification incarnation', solve('queued', [('worker-start', N + 1)], N), 'queued')
check('unknown event is inert', solve('queued', [('unknown-event', N)], N), 'queued')
check('empty delivery batch', solve('queued', [], N), 'queued')
check('N stale deliveries before current delivery', solve('queued', [('worker-start', N - 1)] * N + [('worker-start', N)], N), 'running')
check('trace worker-start then request-pause', solve('queued', [('worker-start', N), ('request-pause', N)], N), 'pause-pending')
check('trace worker-start then work-complete', solve('queued', [('worker-start', N), ('work-complete', N)], N), 'complete')
check('trace worker-start then work-failed', solve('queued', [('worker-start', N), ('work-failed', N)], N), 'failed')
check('trace request-pause then pause-accepted', solve('running', [('request-pause', N), ('pause-accepted', N)], N), 'paused')
check('trace request-pause then pause-rejected', solve('running', [('request-pause', N), ('pause-rejected', N)], N), 'running')
check('trace pause-accepted then resume-click', solve('pause-pending', [('pause-accepted', N), ('resume-click', N)], N), 'resume-pending')
check('trace pause-accepted then work-complete', solve('pause-pending', [('pause-accepted', N), ('work-complete', N)], N), 'complete')
check('trace pause-rejected then request-pause', solve('pause-pending', [('pause-rejected', N), ('request-pause', N)], N), 'pause-pending')
check('trace pause-rejected then work-complete', solve('pause-pending', [('pause-rejected', N), ('work-complete', N)], N), 'complete')
check('trace pause-rejected then work-failed', solve('pause-pending', [('pause-rejected', N), ('work-failed', N)], N), 'failed')
check('trace resume-click then resume-accepted', solve('paused', [('resume-click', N), ('resume-accepted', N)], N), 'running')
check('trace resume-accepted then request-pause', solve('resume-pending', [('resume-accepted', N), ('request-pause', N)], N), 'pause-pending')
check('trace resume-accepted then work-complete', solve('resume-pending', [('resume-accepted', N), ('work-complete', N)], N), 'complete')
check('trace resume-accepted then work-failed', solve('resume-pending', [('resume-accepted', N), ('work-failed', N)], N), 'failed')
check('trace work-complete then late-progress', solve('running', [('work-complete', N), ('late-progress', N)], N), 'complete')
check('trace late-progress then late-progress', solve('complete', [('late-progress', N), ('late-progress', N)], N), 'complete')
check('trace work-complete then late-progress', solve('paused', [('work-complete', N), ('late-progress', N)], N), 'complete')
check('domain state regression 1: done', solve('running', [('work-complete', N, {'job': 1})], N, {}, 'done'), {'phase': 'running', 'value': 3})
check('domain state regression 2: done', solve('running', [('work-complete', N, {'done': 9})], N, {}, 'done'), {'phase': 'running', 'value': 3})
check('domain state regression 3: done', solve('running', [('work-complete', N, {'done': 10})], N, {}, 'done'), {'phase': 'complete', 'value': 10})
check('domain state regression 4: paused_at', solve('pause-pending', [('pause-accepted', N, {})], N, {}, 'paused_at'), {'phase': 'paused', 'value': 3})
check('domain state regression 5: paused_at', solve('resume-pending', [('resume-accepted', N, {})], N, {'paused_at': 3}, 'paused_at'), {'phase': 'running', 'value': None})
check('domain state regression 6: done', solve('complete', [('late-progress', N, {'done': 2})], N, {'done': 10}, 'done'), {'phase': 'complete', 'value': 10})
check('domain state regression 7: done', solve('running', [('request-pause', N, {}), ('pause-accepted', N, {}), ('resume-click', N, {}), ('resume-accepted', N, {}), ('work-complete', N, {'done': 10})], N, {}, 'done'), {'phase': 'complete', 'value': 10})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
queued / worker-startrunningrunningPassed
running / request-pausepause-pendingpause-pendingPassed
pause-pending / pause-acceptedpausedpausedPassed
pause-pending / pause-rejectedrunningrunningPassed
paused / resume-clickresume-pendingresume-pendingPassed
resume-pending / resume-acceptedrunningrunningPassed
running / work-completecompletecompletePassed
running / work-failedfailedfailedPassed
complete / late-progressqueuedcompleteFailed
paused / work-completecompletecompletePassed
older notification incarnationqueuedqueuedPassed
future notification incarnationqueuedqueuedPassed
unknown event is inertqueuedqueuedPassed
empty delivery batchqueuedqueuedPassed
N stale deliveries before current deliveryrunningrunningPassed
trace worker-start then request-pausepause-pendingpause-pendingPassed
trace worker-start then work-completecompletecompletePassed
trace worker-start then work-failedfailedfailedPassed
trace request-pause then pause-acceptedpausedpausedPassed
trace request-pause then pause-rejectedrunningrunningPassed
trace pause-accepted then resume-clickresume-pendingresume-pendingPassed
trace pause-accepted then work-completecompletecompletePassed
trace pause-rejected then request-pausepause-pendingpause-pendingPassed
trace pause-rejected then work-completecompletecompletePassed
trace pause-rejected then work-failedfailedfailedPassed
trace resume-click then resume-acceptedrunningrunningPassed
trace resume-accepted then request-pausepause-pendingpause-pendingPassed
trace resume-accepted then work-completecompletecompletePassed
trace resume-accepted then work-failedfailedfailedPassed
trace work-complete then late-progressqueuedcompleteFailed
trace late-progress then late-progressqueuedcompleteFailed
trace work-complete then late-progressqueuedcompleteFailed
domain state regression 1: done{'phase': 'running', 'value': 3}{'phase': 'running', 'value': 3}Passed
domain state regression 2: done{'phase': 'running', 'value': 3}{'phase': 'running', 'value': 3}Passed
domain state regression 3: done{'phase': 'complete', 'value': 10}{'phase': 'complete', 'value': 10}Passed
domain state regression 4: paused_at{'phase': 'paused', 'value': 3}{'phase': 'paused', 'value': 3}Passed
domain state regression 5: paused_at{'phase': 'running', 'value': None}{'phase': 'running', 'value': None}Passed
domain state regression 6: done{'phase': 'queued', 'value': 10}{'phase': 'complete', 'value': 10}Failed
domain state regression 7: done{'phase': 'complete', 'value': 10}{'phase': 'complete', 'value': 10}Passed

SHA-256 / 76d962b7c6e5aeed5d116586eb90c50cd070246b6da8657e0e3ec7efe78ddf20

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This mechanism has 39 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

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Verification & scope

Stipulated single-notification state and policy model only. Event delivery and acknowledgements are explicit test inputs. No DOM, accessibility announcements, live timers, networking, actual rendering, or production-platform conformance is simulated. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:42:31.934210+00:00.

Case digest / 2a6e4aee12f7b0a92c0e788eedfa4b6074e47ffaca35620388a79a5d4acb3485