Heartbeat-only idle-period E2E (apiserver alone, zero write traffic during a 268s+ post-kill observation window) designed as a targeted, cleaner confirmation experiment for task 5.1's bug-039 finding. Result: bug-039 reproduces a second time, more cleanly than task 5.1 -- zero rejoin log lines throughout the observation window, and even a post-window diagnostic write call (which itself succeeds against the confirmed-new primary) triggers zero rejoin activity, ruling out "task 5.1 was just unlucky timing." Controller-side logs corroborate independently: zero "apiserver" references anywhere in the new primary's log, meaning no join attempt of any kind ever reached it. This task's own literal pass bar was not met -- approved on the same basis as task 5.1: the validation itself succeeded rigorously and honestly surfaced a real, now doubly-confirmed gap in the already- shipped task 4.3/4.4 rejoin mechanism, which is the task's actual purpose. A dedicated follow-up to fix heartbeat.go's transition detection is warranted, separate from this spec's remaining scope. No src/ changes -- live validation only. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NNB4zGPCsHyDUCDJyMbiQN |
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