26354292646
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Ran 24 May 2026 06:47AM UTC

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Files 74

Run time 1min

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Committed 24 May 2026 06:43AM UTC coverage: 94.736% (-0.02%) from 94.754%

Build # 26354292646

Build Type

push

github

Committed by

web-flow

Commit Message

test(server): pin that sustained leader churn never exits the watch loop (#204) (#289)

Issue #204 (post-merge follow-up of #201) reported that under paxos's
frequent leader churn, the server's leader-watch loop exhausted the
fence's transient retries, returned Err, and took all three server
tasks down with it — the stress harness recorded zero successful
client calls.

That root cause was already resolved by the racing-retry work: the
fence's TransientDriver arm now retries with capped backoff while
concurrently watching the leadership stream, so paxos's step-down
(reported as a transient append failure, not NotLeader) is observed
and dispatched instead of being retried into exhaustion. The paxos
ci-smoke repro now records ~52k successful client calls with zero
invariant violations.

This adds a regression test for the part #204 actually names —
*sustained* oscillation. It drives several Leader -> Follower -> Leader
cycles, each opening with a transient fence burst, and asserts the
watch task survives every cycle, re-serves each time leadership
returns, and serves a real GetTs end-to-end afterward. A mutation
that reinstates give-up-and-exit on the first transient makes this
test fail, confirming it guards the behavior rather than passing
vacuously.

No production behavior change.

Coverage Stats

10673 of 11266 relevant lines covered (94.74%)

493869.32 hits per line

Coverage Regressions

Lines	Coverage	∆	File
2	84.37	-0.54%	benchmarks/stress/src/topology/paxos.rs

Jobs

ID	Job ID	Ran	Files	Coverage
1	26354292646.1	24 May 2026 06:47AM UTC	74	94.74	GitHub Action Run

prisma-risk / tsoracle / 26354292646
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