Telstra’s Time Sync Outage, DoorDash’s 1.5M RPS Cache, Stateless MCP, GitHub and PyPI Supply Chain Delays, and Why the Quietest Infrastructure Often Has the Biggest Blast Radius

This week on Ship It Weekly: Telstra’s mobile network jumped back to 2006 after a timing device restarted with the wrong date, disrupting calls, data sessions, and hundreds of emergency calls.DoorDash explains how Entity Cache, built with Envoy and Valkey, handles more than 1.5 million requests per second and uses stale-data policies, invalidation, and fallback behavior as a reliability layer.The latest MCP release candidate removes protocol-level sessions, making servers easier to scale behind ordinary load balancers while leaving teams responsible for authentication, tracing, retries, rate limits, and application state.GitHub and PyPI are also adding friction to package automation. Dependabot now delays routine updates by three days, while PyPI blocks new files from releases older than 14 days.LinksTelstra outage https://www.telstra.com.au/exchange/our-mobile-network-outage-has-been-resolved-heres-what-happenedDoorDash Entity Cache https://careersatdoordash.com/blog/high-performance-proxy-cache-for-doordash-services/MCP specification release candidate https://blog.modelcontextprotocol.io/posts/2026-07-28-release-candidate/Dependabot package cooldown https://github.blog/changelog/2026-07-14-dependabot-version-updates-introduce-default-package-cooldown/PyPI release-file restrictions https://blog.pypi.org/posts/2026-07-22-releases-now-reject-new-files-after-14-days/Amazon ECS Action Logs https://aws.amazon.com/about-aws/whats-new/2026/07/amazon-ecs-action-logs/Network Load Balancer listener rules https://aws.amazon.com/about-aws/whats-new/2026/07/aws-network-load-balancer-supports-listener-rules/Amazon Managed Prometheus limits https://aws.amazon.com/about-aws/whats-new/2026/07/amazon-managed-service-prometheus-1500m-metrics-workspace/PixelSmash in FFmpeg https://jfrog.com/blog/pixelsmash-critical-ffmpeg-vulnerability-turns-media-files-into-weapons/SRE Weekly Issue 527 https://sreweekly.com/sre-weekly-issue-527/This week’s On Call Brief https://www.tellerstech.com/on-call-brief-news/2026-W31/More episodes https://shipitweekly.fm/