smoketest: T9218: wait for commit lock before cli_set/cli_delete too - #5411
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| Layer / File(s) | Summary |
|---|---|
Shared lock wait integration smoketest/scripts/cli/base_vyostest_shim.py |
The shim imports commit_in_progress2() and adds _wait_for_commit_lock(), which polls every 250 ms. cli_set(), cli_delete(), and cli_discard() wait before session operations. cli_commit() uses the shared helper instead of lsof polling. |
🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
| Check name | Status | Explanation |
|---|---|---|
| Docstring Coverage | ✅ Passed | No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. |
| Linked Issues check | ✅ Passed | Check skipped because no linked issues were found for this pull request. |
| Out of Scope Changes check | ✅ Passed | Check skipped because no linked issues were found for this pull request. |
| Title check | ✅ Passed | The title clearly identifies the smoketest change and the added commit-lock wait for cli_set and cli_delete. |
| Description check | ✅ Passed | The description accurately explains the commit-lock race, affected operations, test failure, shared helper, and related task. |
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Inline comments:
In `@smoketest/scripts/cli/base_vyostest_shim.py`:
- Around line 95-104: The _wait_for_commit_lock method can block indefinitely
while commit_lock remains open. Add a configurable timeout using a monotonic
deadline, repeatedly check the lock only until that deadline, and raise or
otherwise fail with diagnostic context when the timeout expires; preserve the
existing polling interval and ensure cli_set, cli_delete, and cli_commit receive
the bounded behavior.
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ℹ️ Review info
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Configuration used: Repository YAML (base), Central YAML (inherited), Organization UI (inherited)
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smoketest/scripts/cli/base_vyostest_shim.py
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🧠 Learnings (3)
📚 Learning: 2026-05-26T06:03:59.703Z
Learnt from: c-po
Repo: vyos/vyos-1x PR: 5109
File: smoketest/scripts/cli/test_service_https.py:206-207
Timestamp: 2026-05-26T06:03:59.703Z
Learning: In VyOS smoketests that verify processes running inside a VRF using iproute2, remember that `ip vrf pids <vrf>` outputs one entry per line as `<pid> <process_name>` (e.g., `300431 nginx`), not PIDs alone. Therefore, assertions should check for the presence of the expected process name in the command output (e.g., `assertIn(PROCESS_NAME, cmd(f'ip vrf pids {vrf}'))`) rather than trying to match PID-only output.
Applied to files:
smoketest/scripts/cli/base_vyostest_shim.py
📚 Learning: 2026-05-26T06:04:29.163Z
Learnt from: c-po
Repo: vyos/vyos-1x PR: 5109
File: smoketest/scripts/cli/test_service_https.py:118-120
Timestamp: 2026-05-26T06:04:29.163Z
Learning: In VyOS smoketest scripts under `smoketest/scripts/cli/`, it is intentional to call `self.cli_delete(['vrf'])` in both `setUpClass` and `tearDown` to wipe the entire VRF subtree and ensure a clean slate. During code review, do not recommend narrowing the delete to specific VRF identifiers or name subsets (e.g., `['vrf', 'name', 'mgmt']`)—the broad teardown behavior is the established project-wide pattern for these tests.
Applied to files:
smoketest/scripts/cli/base_vyostest_shim.py
📚 Learning: 2026-06-29T12:13:51.293Z
Learnt from: andamasov
Repo: vyos/vyos-1x PR: 5298
File: smoketest/scripts/cli/test_vpp.py:0-0
Timestamp: 2026-06-29T12:13:51.293Z
Learning: When reviewing vyos-1x code that parses or asserts VPP CLI output (e.g., smoketest CLI tests and VPP op-mode code), do not flag the token spelling "Forwrd" / "U-Forwrd" as a typo. It is intentionally preserved verbatim from the upstream VPP CLI text shown by commands like `vppctl show bridge-domain ... detail`. This misspelling is centrally allowlisted (vyos/.github#153) for that specific VPP-CLI context, so typo-review comments should exclude "Forwrd" when it originates from that VPP output.
Applied to files:
smoketest/scripts/cli/base_vyostest_shim.py
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Relevant task context
- T9218 — “smoketest: wait for commit lock before cli_set/cli_delete too” is an In progress, Normal-priority bug.
- The task identifies a race where
cli_set()/cli_delete()run while a prior commit still holdsCStore’scommit_lock, producing genericConfigSessionErrorfailures. - The intermittent failure was observed in
test_bgp_27_route_reflector_client, specifically asConfigSessionError: Set failed. - The intended fix is to share one commit-lock wait helper across
cli_commit(),cli_set(), andcli_delete(). - T9218 has no comments or additional discussion.
🔇 Additional comments (3)
smoketest/scripts/cli/base_vyostest_shim.py (3)
95-104: 🩺 Stability & AvailabilityFail closed on lock-inspection errors.
At Line 103, every non-zero
run(...)result means “lock clear.” Ifsudoorlsoffails, the helper skips the wait and the race returns. Verify thatrun()returns an integer status and distinguish “no matching process” from command errors before proceeding.
106-116: LGTM!
129-129: 🩺 Stability & AvailabilityVerify direct teardown commits use the same lock contract.
Line 129 protects
cli_commit(), buttearDownClass()still callscls._session.commit()directly at Lines 71 and 80. If either call follows a commit whose asynchronous cleanup still holdscommit_lock, it bypasses_wait_for_commit_lock()and can still raiseConfigSessionError. Confirm that these direct commits are safe or call the helper before them.Evidence: the supplied class contains commit paths outside
cli_commit().
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sarthurdev
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Is it worthwhile also guarding cli_discard?
Interesting question. Lets loop in @jestabro |
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Tick the box to add this pull request to the merge queue (same as
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I recommend applying to discard as well, as @sarthurdev suggests: |
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Added the discussed protection on discard, too. |
cli_commit() already busy-waits for the commit lock to clear before committing, since a concurrent process can still hold it open for a moment. cli_set()/cli_delete() had no such guard, so a set/delete issued right after a commit could race against that lingering lock and fail with a generic "Set failed"/"Delete failed" ConfigSessionError. This caused the intermittent test_bgp_27_route_reflector_client failures, whose set/commit/discard loop hammers the session tightly enough to hit the race.
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jestabro
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jestabro
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Protect cli_set/delete/discard from lingering commit lock. Discussed in PR and sanity check run.
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Change summary
cli_commit()already busy-waits for theCStorecommit_lockto clear before committing, since a concurrent process can still hold it open for a moment.cli_set()/cli_delete()had no such guard, so a set/delete issued right after a commit could race against that lingering lock and fail with a generic "Set failed"/"Delete failed"ConfigSessionError.This is what caused the intermittent
test_bgp_27_route_reflector_clientfailures, whose set/commit/discard loop hammers the session tightly enough to hit the race. Share the wait via a single helper used by all three.Types of changes
Related Task(s)
How to test / Smoketest result
Embedded smoketests run fir this PR
Checklist: