Add robustness test regression target for 20693 #20663

henrybear327 · 2025-09-13T23:28:18Z

Based on the discovery from Marek #20234 #20221 (comment).

Please see the discussion starting from #20349 (comment)

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

k8s-ci-robot · 2025-09-13T23:28:23Z

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codecov · 2025-09-13T23:58:40Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.05%. Comparing base (4601818) to head (7587cfc).

Additional details and impacted files

see 34 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #20663      +/-   ##
==========================================
- Coverage   69.14%   69.05%   -0.10%     
==========================================
  Files         420      417       -3     
  Lines       34817    34682     -135     
==========================================
- Hits        24074    23948     -126     
+ Misses       9338     9324      -14     
- Partials     1405     1410       +5

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serathius · 2025-09-14T10:17:28Z

THe robustness tests flaked with main_test.go:175: rpc error: code = Canceled desc = grpc: the client connection is closing. Do we know why?

serathius · 2025-09-14T10:19:32Z

There is also flake on TestRobustnessRegression/Issue15271, maybe we should consider making the additional watch requests optional and disable them for regression tests that don't need them.

henrybear327 · 2025-09-14T11:13:59Z

THe robustness tests flaked with main_test.go:175: rpc error: code = Canceled desc = grpc: the client connection is closing. Do we know why?

Not yet, as I am looking into it just now. I was actually puzzled when I saw the watch validation passed on CI, but the test failed.

henrybear327 · 2025-09-15T20:43:15Z

The target is created! Reproduction is now consistent.

henrybear327 · 2025-09-19T15:38:50Z

/retest pull-etcd-robustness-amd64

k8s-ci-robot · 2025-09-19T15:38:54Z

@henrybear327: The /retest command does not accept any targets.
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/test pull-etcd-e2e-arm64

/test pull-etcd-fuzzing-v3rpc

/test pull-etcd-govulncheck

/test pull-etcd-grpcproxy-e2e-amd64

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/test pull-etcd-markdown-lint

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/test pull-etcd-unit-test-arm64

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In response to this:

/retest pull-etcd-robustness-amd64

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henrybear327 · 2025-09-19T15:39:05Z

/test pull-etcd-robustness-amd64

tests/robustness/Makefile

henrybear327 · 2025-09-21T18:34:30Z

@serathius I am renaming the target to 20693, as this is probably a better reference to the issue you fixed and discovered!

henrybear327 · 2025-09-21T18:42:24Z

Merging of this PR is dependent on #20689

tests/robustness/Makefile

henrybear327 · 2025-09-21T19:25:34Z

/retest

tests/robustness/Makefile

serathius · 2025-09-22T08:31:45Z

tests/robustness/scenarios/scenarios.go

+
+	scenarios = append(scenarios, TestScenario{
+		Name:      "issue20693",
+		Profile:   traffic.HighTrafficProfile.WithoutCompaction().WithBackgroundWatchConfigInterval(10 * time.Millisecond).WithBackgroundWatchConfigRevisionOffset(-10),


This is not the best way to reproduce the issue. The current reproduction rate (one per 30 minutes) is to low. As the root cause is known, request with watch revision -1, please consider adding more targeted test to ensure higher reproducibility.

Got you.

Still puzzled by how come I am consistently reproduce the problem almost all the time with <2 min on my Macbook but not else where.

serathius · 2025-09-22T09:23:34Z

tests/robustness/scenarios/scenarios.go

+			e2e.WithClusterSize(3),
+			e2e.WithCompactionBatchLimit(10),
+			e2e.WithSnapshotCount(50),
+			e2e.WithSnapshotCatchUpEntries(100),
+			e2e.WithGoFailEnabled(true),
+			e2e.WithPeerProxy(true),
+			e2e.WithIsPeerTLS(true),


With the current root cause known, we can just disable most of those config changes.

Reference: - etcd-io#20693 Signed-off-by: Chun-Hung Tseng <[email protected]>

k8s-ci-robot · 2025-09-26T05:23:51Z

@henrybear327: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-etcd-e2e-amd64	`7587cfc`	link	true	`/test pull-etcd-e2e-amd64`
pull-etcd-e2e-386	`7587cfc`	link	true	`/test pull-etcd-e2e-386`
pull-etcd-robustness-amd64	`7587cfc`	link	true	`/test pull-etcd-robustness-amd64`
pull-etcd-robustness-arm64	`7587cfc`	link	true	`/test pull-etcd-robustness-arm64`

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henrybear327 requested a review from serathius September 13, 2025 23:28

k8s-ci-robot added area/robustness-testing area/testing labels Sep 13, 2025

henrybear327 self-assigned this Sep 13, 2025

k8s-ci-robot added the size/L label Sep 13, 2025

henrybear327 force-pushed the robustness-test-reproduce-20573 branch 2 times, most recently from d3481ed to 3566e71 Compare September 13, 2025 23:34

henrybear327 mentioned this pull request Sep 14, 2025

Improve robustness coverage of revision window for Watch and other read methods. #20349

Open

henrybear327 force-pushed the robustness-test-reproduce-20573 branch 8 times, most recently from c7112ac to 8de83cd Compare September 15, 2025 20:41

henrybear327 force-pushed the robustness-test-reproduce-20573 branch 8 times, most recently from 06f3ee9 to 9e80f44 Compare September 15, 2025 21:44

henrybear327 force-pushed the robustness-test-reproduce-20573 branch 3 times, most recently from c11049c to a0744cb Compare September 19, 2025 20:06

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henrybear327 force-pushed the robustness-test-reproduce-20573 branch from a0744cb to 70a3d98 Compare September 21, 2025 14:54

serathius mentioned this pull request Sep 21, 2025

Reject watch request with -1 revision to prevent invalid resync behavior on uncompacted etcd and make rangeEvents safe against negative revision. #20693

Merged

henrybear327 changed the title ~~Add robustness test regression target for 20573~~ Add robustness test regression target for 20693 Sep 21, 2025

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Implement robustness test target for 20693

7587cfc

Reference: - etcd-io#20693 Signed-off-by: Chun-Hung Tseng <[email protected]>

henrybear327 force-pushed the robustness-test-reproduce-20573 branch from 6782a10 to 7587cfc Compare September 26, 2025 04:47

Add robustness test regression target for 20693 #20663

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