Xcode Cloud build failures have resumed affecting iOS app developers, particularly those using ad-hoc and app-store distribution methods. The error, indicated by Command exited with non-zero exit-code: 70, stems from issues with app signing despite successful xcodebuild commands. This problem arose post-vacation and into the new year, causing significant disruptions in build pipelines.

The issue is traced back to missing certificates in the DVTServices: Response payload, a critical component for app signing. This absence suggests that Apple may be generating and expiring private keys internally, leading to build failures. The solution involves revoking automatically created certificates in the Apple Developer Portal to prompt the generation of new, valid certificates.

This event highlights the reliance of iOS developers on Xcode Cloud for efficient and fast build processes. The transition from Azure DevOps to Xcode Cloud had previously reduced build times by over 50%, making it a critical tool for many development teams. The current issue underscores the need for developers to monitor and manage their signing certificates diligently, as the problem affects those using Xcode Cloud for ad-hoc and app-store distribution.

The implications are significant for developers who rely on seamless build processes to maintain their app distribution timelines. The disruption could lead to delays in app updates and releases, affecting user experience and potentially impacting user engagement and retention.