Release notes
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Jan 27, 2026 — MSL5 Production Release

17 days ago

This release introduces significant enhancements aimed at improving service resilience, expanding live streaming capabilities with low-latency support, and addressing performance issues across the platform. We’ve focused on delivering new features for both the MSL Portal and MSL Origin, alongside a comprehensive set of bug fixes and improved error handling to ensure a more robust and reliable user experience.

MSL Portal Updates

  • Enhanced High Availability Portal deployment across multiple Azure regions to ensure continuous service and resilience against regional failures.
  • Subsegment Clipping is now available directly to the User Interface for HLS streams.
  • Group Management has been improved to prevent the deletion of groups that still have associated resources, enhancing data integrity.
  • Configurable Ingest HTTP Latency Alert thresholds are now available (200ms, 300ms, 400ms) to enable proactive monitoring of ingest performance and timely detection of latency issues.
  • User Interface & Reporting: Resolved an issue where the aggregated Total Ingest Hits metric displayed in the Metrics Dashboard did not match the sum of detailed metrics in per-stream and per-event views. In some cases, Total Ingest Hits displayed as 0 despite having active HTTP response metrics.
  • Alerting & Notifications: Resolved an issue where users could not receive alerts triggered from the alert condition “Loss of a Specific Stream Bitrate”.

MSL Origin Updates

  • Added support for Low-Latency HLS (LL-HLS) (Beta).
  • Added Enhanced Master Playlist Ingest Protection to prevent stale manifests from overwriting current ones during hard migration scenarios. MSL5 Origin now identifies master playlists uploaded by MSL4 forwarder through HTTP headers (X-Akamai-Forwarder-Ingest-StartTime, X-Akamai-From-MTS) and prevents republished manifests from MSL4 MTS from overwriting encoder-direct uploads, ensuring manifest integrity during migration
    workflows.
  • Egress & Playback:
    • Resolved an issue where Live2VOD requests for republished event of DASH timeline-based streams returned 404 errors.
    • Fixed HLS Live2VOD master playlist requests returning 404 errors when the start time was close to the
      event start time and the requested duration was short (~30 seconds to ~1 minute).
    • Fixed an issue where streams with outdated segment references triggered automated content protection
      systems, resulting in persistent 404 errors when the retention system detected stale content that
      exceeded the retention window. Additional checking that triggered the content protection system has
      been disabled as mitigation.
    • Added support for Origin-Assist Prefetching for Live2VOD and Instant TV content. Prefetching now
      functions correctly when enabled in CDN configuration.
  • Live2VOD & Content Management: Implemented validation to reject Live2VOD requests for content older than 31 days with an appropriate error, directing users to use Past Event functionality for archival content instead.