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test(rekey): add Phase 5 settle window for post-second-rekey convergence

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Phase 5's per-pair connectivity check ran immediately after the second
rekey cycle, with no settle for routing reconvergence. Under
GitHub-runner CPU contention, post-rekey parent-switches and
coord-cache flushes can take longer than the per-ping 5s timeout for
a small fraction of pairs (1-3 of 20 typically), even though the
rekey mechanism itself completes cleanly. Phase 6 log analysis stays
all-green on these failed runs; the failure is purely connectivity
timing.

Mirror Phase 3's existing 12-second settle pattern: reuse REKEY_SETTLE
and emit the same banner shape. Two-line change. Cost on the success
path is a fixed 12s per suite run.
This commit is contained in:
Johnathan Corgan
2026-05-14 17:54:22 +00:00
parent e9dd3167f2
commit 80fb086071
2 changed files with 9 additions and 1 deletions
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testing/static/scripts/rekey-test.sh
+2 -1
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@@ -368,7 +368,8 @@ echo "Phase 4: Second rekey cycle (waiting ${SECOND_REKEY_WAIT}s)"
sleep "$SECOND_REKEY_WAIT"
# Verify connectivity after second rekey (back-to-back)
echo "Phase 5: Post-second-rekey connectivity"
echo "Phase 5: Post-second-rekey connectivity (settling ${REKEY_SETTLE}s)"
sleep "$REKEY_SETTLE"
ping_all
phase_result "Post-second-rekey (all 20 pairs)"
echo ""