314593 2026-05-11 16:30:45 -0700 MediaUsageManagerCocoa::removeMediaSession doesn't clear UsageTrackingAgent state when being released 2026-05-12 20:42:44 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 bfulgham bfulgham webkit-bug-importer oldest_to_newest 2209898 0 bfulgham 2026-05-11 16:30:45 -0700 WebKitTestRunner streams incoming test cases and rarely shuts down or cleans up like a user might when closing a tab. The logic in the various WebKitTestRunner test reset methods is meant to handle this, but we seem to have overlooked UsageTracking, which can lead to the system shutting the test runner down for holding too many active XPC connections to that process. We need to clean up when switching tests on some cadence so that we don't exceed the process limit and cause a spurious WKTR crash. 2209899 1 bfulgham 2026-05-11 16:32:04 -0700 Example: In a recent test I ran trying to stress a single test (by iterating 500 times), WKTR was killed for exceeding 2048 kqworkloops (hit 2049). Of those ~2049 workloops, 1994 (97%) were leaked `com.apple.NSXPCConnection.m-user.com.apple.UsageTrackingAgent` connections. It seems like each test iteration likely triggers a new XPC connection to that service that never gets torn down within the long-lived WebKitTestRunner process. 2209900 2 webkit-bug-importer 2026-05-11 16:32:18 -0700 <rdar://problem/176832251> 2209905 3 bfulgham 2026-05-11 16:55:00 -0700 Pull request: https://github.com/WebKit/WebKit/pull/64713 2210371 4 ews-feeder 2026-05-12 20:42:43 -0700 Committed 313125@main (749fddf048e0): <https://commits.webkit.org/313125@main> Reviewed commits have been landed. Closing PR #64713 and removing active labels.