Streaming incidents,
caught before they spread.

How a 9% viewer-impact, six-minute license-fetch stall during a weekday primetime spike was caught from viewer-impact telemetry, ranked as a license-server cold-start at high confidence, and remediated with a pre-warm plus entitlement-cache TTL bump — including which acts the Streamwake agent did autonomously vs. surfaced to humans.

Synthetic postmortem on the regression that looks like an ISP problem but is a CDN problem (and the reverse). Same player-visible symptom, two fix branches — and the Streamwake probe pattern that picks the branch in under a minute.

How an ~11% cohort parse-stall (~8 minute mid-window EXT-X-MEDIA-SEQUENCE drift on a weekday primetime live HLS lane) was caught from viewer-impact telemetry, ranked as manifest_packager_segment_drift at high confidence (with the discontinuity_injection_stitcher and vod_manifest_dropping_cues lanes ruled out), and remediated with a snapshot+reread plus a reissued-packager split — including which acts the Streamwake agent did autonomously vs. surfaced to humans.

How a 14% buffer-cliff cohort, ~9 minute encoder mid-window CBR overshoot during a weekday primetime panel-show ladder switchover was caught from viewer-impact telemetry, ranked as encoder_abr_switchover_overshoot at high confidence (with the CDN-egress budget lane ruled out), and remediated with a switchover-window retune plus an egress-budget tolerance bump — including which acts the Streamwake agent did autonomously vs. surfaced to humans.

How a ~22% cue-coverage collapse (~13 minute stitcher cue-drop across the cdn-A→cdn-E seam on a Friday primetime) was caught from manifest + cue-coverage telemetry, ranked as stitcher_cue_filter_overshoot at high confidence (with the vod_manifest_missing_cue and scte35_signal_replay_normal lanes ruled out), and remediated with a split live/VOD cue-pass policy plus a raised vod.cue_point_coverage probe — including which acts the Streamwake agent did autonomously vs. surfaced to humans.

Synthetic postmortem on how a weekday primetime LL-HLS / CMAF event saw a ~9% startup-fallback cohort (~9 minute partial-segment cache warm-up crescendo on cdn-A/atl01) when newly activated edge POPs primed the segment bucket only — manifests 200, segment leg green, but partial-segment fetches on the affected regional cohort ran wider than PART-HOLD-BACK. Streamwake caught it from viewer-impact telemetry, ranked it as edge_partial_segment_warmup at 84% confidence (with isp and encoder partial-fault lanes ruled out), and remediated with a partial-segment prewarm + cache-tail-pin rebalance — including which acts the Streamwake agent did autonomously vs. surfaced to humans.

Synthetic postmortem on how a weekday primetime live encoder saw a ~8% startup-join-stall cohort (~7 minute I-frame-cadence crescendo on the encoder firmware cohort) when a firmware upload the night before widened GOP cadence to 2.14s (vs 1.01s baseline) and I-frame alignment drifted past the 33ms cohort cadence tolerance. Streamwake caught it from viewer-impact telemetry, ranked it as encoder_firmware_gop_cadence_regression at 88% confidence (with cdn_egress_budget and abr_ladder_switchover lanes ruled out), and remediated with a live-encoder firmware rollback + cohort pin-and-quarantine — including which acts the Streamwake agent did autonomously vs. surfaced to humans.

Synthetic postmortem on how a weekday primetime marquee live-event spike (sports final or keynote) fanned concurrent viewer connection demand into the CDN origin-shield queue past its pre-provisioned ceiling — late-join cohort divergence, sustained reconnect storm, shield queue p99 climbing past the slot budget while edge egress stayed green and the segment leg returned cache hits. Streamwake caught it from viewer-impact telemetry, ranked it as origin_shield_queue_saturation at 86% confidence (with edge_pop_cache_miss_amplification and encoder_bandwidth_regression lanes ruled out), and remediated with either a shield pull / ceiling expansion (autonomous under a confidence-and-cohort-divergence gate) or a viewer-side reconnect-throttle (surfaced to humans) — with recovery verified viewer-side, not queue-side.

Synthetic postmortem on how an eu-west residential / ISP-side congestion event the player reports as a CDN failure is disambiguated by cache.freshness + cache.availability + edge.geo_drift + multicdn.winner_RTT (all four pass — CDN leg is healthy at zero egress change) while isp.peer_congestion + isp.last_mile_rtt + tcp.retransmit_rate fail on three AS blocks at once (as3356 / as5511 / as1299). Streamwake caught it from viewer-impact telemetry, ranked it as isp_congestion · dominant at 83% confidence (with cdn_failure · ruled out by name on the cache.availability + cache.freshness + multicdn.winner_RTT discriminator and transit_or_peering_failure as the alternate), and remediated with a prewarmed low-bitrate variant + ISP-side reprobe (autonomous under a confidence-and-cohort-divergence gate) and a peering-provider ticket on the affected AS block (surfaced to humans) — with recovery verified cohort-side on cohort_join_stall_ratio + cohort_rebuffer_ratio + last_mile_rtt, NOT on the cache leg turning green again.