Decrement was decrement-first with a single non-retried repair CAS. From zero,
two unmatched decrements (SignalR calls OnDisconnectedAsync for a connection
whose OnConnectedAsync faulted) capture -1 and -2; a real Increment then makes
the count -1, and the first decrementer's stale CompareExchange(0, -1) matches
and resets to zero — erasing a live connection, so the idle gate freezes an open
dashboard. The same lost race also made Decrement report 0 when it had not
written 0.
Clamping now happens inside the compare-and-swap: read, clamp, publish, retry on
loss. A lost race re-reads the fresh value instead of repairing a stale one.
The counter moves to its own file per the one-public-type-per-file convention and
gains direct tests: the zero floor under concurrent unmatched decrements, matched
pairs settling at zero, and an interleaved connect/disconnect stress round. The
stress test asserts the observable invariants only — the specific interleaving
cannot be forced through the public API (verified: the previous implementation
passes it), which its remarks now state rather than implying a reproducer. A hub
wiring test is skipped for the EventsHub reason: driving Hub.OnConnectedAsync
needs caller-clients and connection-context fakes, and the overrides are two
lines of delegation to the tested type.
Also documents that the API-key refresh's pre-gate time check races benignly.
The snapshot publisher broadcast to Clients.All on every ~1s tick forever, with
zero viewers. Each tick cost a session-registry snapshot and sort, a metrics
snapshot that copies dictionaries under the global metrics lock, a full rebuild
of EffectiveGatewayConfiguration, and a SQLite read of the API key table.
DashboardSnapshotHub now counts live connections into the singleton
DashboardSnapshotHubConnectionCounter (clamped at zero, since SignalR can call
OnDisconnectedAsync for a connection whose OnConnectedAsync faulted). The
publisher drives the snapshot enumerator by hand instead of await foreach: with
no connections it does not call MoveNextAsync at all, so the producing iterator
stays suspended at its yield and no snapshot is built — the gate removes the
build, not just the broadcast. It re-checks once a second, so the first viewer
resumes the tick within about one interval; that viewer is seeded immediately by
DashboardPageBase's synchronous GetSnapshot() and by the hub's OnConnectedAsync.
Two per-tick costs are bounded independently of the gate: the effective
configuration is startup-static (options are bound once at boot and never
reloaded), so it is built once and cached; and the API key summaries refresh at
most every 15s, since the list only changes when an operator creates, rotates,
or revokes a key. Only a successful refresh restarts the interval, so a failed
or timed-out read is still retried on the next tick with the previous summaries
left on screen.
DashboardEventBroadcaster.Publish ran a deep protobuf Clone (redaction is on by
default) and a group SendAsync for every event of every session, before anything
checked whether a dashboard client was actually watching. In the steady state the
session:{id} group is empty, so that work was thrown away per event.
SignalR does not expose group membership, so EventsHub now mirrors its own
add/remove into a singleton EventsHubViewerRegistry, and OnDisconnectedAsync
releases everything a dropped connection held (SessionDetailsPage disposes the
connection rather than unsubscribing). Publish returns early when the session has
no viewers, before the redaction clone. Watched sessions behave exactly as before.
Lazy mirror-lease start/stop was deliberately not attempted — it entangles the
dashboard with SessionEventDistributor subscribe lifetime for no saving beyond
this gate; recorded in docs/GatewayDashboardDesign.md.
The policy tests shipped at 1c30611 could not detect a deleted gate. They
assert that secrets:manage admits an Administrator and refuses a Viewer —
true, and library behaviour this repo did not author. The wiring is the
only thing that change introduced, and nothing covered it.
The point is sharper for repos where the link already existed before
gating, which includes this one: "an Administrator still sees it" is
identical to the pre-change behaviour, so it cannot distinguish a working
gate from an inert AuthorizeView. Only the negative observation proves a
gate is there at all.
SecretsNavRenderTests renders MainLayout through the framework's static
HtmlRenderer — no component-testing package, because the assertion is
about emitted markup rather than interactivity — and asserts:
- absent for a Viewer, and for an anonymous caller (the load-bearing pair)
- present for an Administrator (the control: without it, a rail that
rendered nothing at all would satisfy both absence assertions and the
suite would report a working gate over a blank page)
- the ungated API Keys sibling still present for a Viewer, so a later
"consistency fix" that hides it fails loudly rather than silently
removing read access
Confirmed non-vacuous by mutation rather than by argument: with the
AuthorizeView removed from the layout, both absence tests go red and all
three original policy tests stay green.
Build 0 warnings / 0 errors; suite 899/899 (895 + 4).
Family-wide nav sweep: the Secrets management page should be linked from
each app's UI, visible to Administrator-role users only.
The link already existed in MainLayout's Admin section. The gate did not:
the rail rendered every item for every visitor, including a Viewer and the
anonymous-localhost read-only identity. Not an access hole — the mounted
page carries [Authorize(Policy = "secrets:manage")], so a Viewer clicking
through was denied — but a dead link presented as a live one. There was
also no existing role-gated nav pattern to follow; the rail's only
AuthorizeView was the footer's signed-in/signed-out split.
Gated on the POLICY rather than a role literal, so nav visibility cannot
drift from what the page enforces. In this host the two are equivalent:
GatewayOptionsValidator constrains Dashboard:GroupToRole values to
Administrator or Viewer, so the shared library's other manage-granting
roles (secrets-manager, secrets-reveal) are unreachable. The policy form
stays correct if that ever relaxes, where a role literal would then hide
the link from users who can use the page.
API Keys is deliberately left ungated. It looks like the same case and is
not: ApiKeysPage renders for a Viewer with write affordances hidden, so
hiding its link would remove legitimate read access. The secrets page has
no read-only mode. The rule is "gate the link when the page denies the
role outright", not "gate everything under Admin".
Coverage: three tests pin the policy's verdict per principal
(Administrator admitted, Viewer refused, unauthenticated refused), and
/admin/secrets joins the canonical route list — it is the one nav
destination mounted from an RCL rather than declared here, so a routing
regression could remove it without touching this repo's pages. The
principal helper sets an authentication type deliberately: without one
the role assertions would pass vacuously for the wrong reason.
Not a rendering test — the suite has no component-testing harness, and
adding one to assert a single AuthorizeView would be a large dependency
for a small claim.
Build 0 warnings / 0 errors; suite 895/895.
Auth 0.1.5 -> 0.2.0, Health 0.2.0 -> 0.3.0, Secrets/.Abstractions/.Ui
0.6.1 -> 0.6.2. Theme, GalaxyRepository, Audit, Configuration, Telemetry
and Telemetry.Serilog were already at the newest version on the feed.
Checked against the shared-lib source rather than the version numbers,
because these packages are versioned as a family and a bump is not by
itself evidence that the package changed:
- Auth 0.2.0 is the only one carrying content for us: LDAP backup-DC
failover (FallbackServers, endpoint walk with sticky preference,
boot-time entry validation). Purely additive; the default is empty,
which leaves single-endpoint behaviour unchanged.
- Health 0.3.0 carries a breaking change, but every line of it is in
ZB.MOM.WW.Health.Akka, which we do not reference. No commit touched
the core ZB.MOM.WW.Health package between 0.2.0 and 0.3.0.
- Secrets 0.6.2 is a message-only change: one validator string literal
gains mounted-volume guidance. SecretsStorePathRules is untouched.
The four non-csproj files are not a separate feature. Configuration/
LdapOptions is a deliberate shadow of the shared type and carries an
explicit warning to mirror any new upstream field, because AddZbLdapAuth
binds the whole MxGateway:Ldap section onto the shared options. So
FallbackServers is live on our config surface the moment the package
lands, and without the mirror an operator could configure a backup DC
that works but is invisible on the dashboard's Settings page. The
Settings row renders "none" when empty, since that is the answer someone
who believes a backup DC is configured actually needs.
Entry syntax is deliberately NOT re-validated here: the shared validator
already fails the boot on a malformed entry and owns the (internal)
parser, so a second copy would drift. Note both validators skip entirely
when Ldap:Enabled is false.
Verified the binder is non-strict (ErrorOnUnknownConfiguration is unused
anywhere in the tree), so the upgrade could not break startup on a
newly-recognised key either way.
Build 0 warnings / 0 errors; gateway suite 892/892, unchanged. The live
LDAP tests are opt-in and were not run, so the failover path itself is
covered only by the shared library's own tests.
0.6.0 put the store-path rules in the shared library, but the guard was not
running at the moment that matters here.
CreateBuilder resolves ${secret:} references before the host exists, using a
throwaway ServiceCollection that contains no IHostEnvironment — and it runs the
store migrator, which creates the database. The library resolved the content
root from IHostEnvironment alone, so it could not distinguish "no content root"
from "no host registered" and skipped the under-content-root rule entirely. The
store was created at the rejected path; the boot then failed a moment later when
the real host validated. The leftover empty database with its -wal/-shm siblings
is exactly the artifact that made the 2026-08-09 credential loss read as "the
database is there, it's just empty".
The pin alone does not close this. An app with a correctly configured path shows
no symptom and is still unprotected, because the guard simply is not running when
the store is created. 0.6.1 adds a 4-argument AddZbSecrets overload taking the
content root explicitly, and the call site has to use it. The in-host
registration below needs nothing.
Verified by removing the fix rather than by observing a clean boot — which is how
this survived its first release. With the 3-argument overload the new test fails
by finding a created database at
src/ZB.MOM.WW.MxGateway.Server/probe-secrets-*.db: inside the source tree, since
that is what the content root resolves to under test.
Two things about the test itself, both of which it would have been easy to get
subtly wrong:
It asserts no-file-created before asserting that startup threw. "It threw" is the
weaker claim, and asserting it first masks the stronger one — the run that proved
this defect would have reported "no exception was thrown" and said nothing about
the database sitting in the source tree.
The accepting case asserts the database *is* created, not merely that nothing
threw. A not-null builder is close to a tautology once no exception escaped, and
it would still pass if the pre-host container stopped opening the store at all —
which would also quietly void the rejecting case, since that one can only observe
a file the migration would otherwise have written. The two assertions hold each
other up.
Found by HistorianGateway's adoption, which probed the rejected paths instead of
observing a successful boot.
0.6.0 moves the store-path rules into the shared library — both the rooted check
and the content-root check — with a SecretsOptionsValidator wired into
AddZbSecrets and validated on start, so all four consuming apps get the guard
from one implementation rather than four copies. mxgw therefore adds no local
validator over the Secrets section.
This is a four-minor jump, not a re-pin: mxgw was on 0.2.3 and skips 0.3.0,
0.4.0, 0.4.1, 0.5.0 and 0.5.1 in one step. Verified rather than assumed —
diffing the 0.2.3 and 0.6.0 assemblies shows the added surface is the new path
rules and their plumbing (AddIfNotRooted, AddIfUnderContentRoot,
ComputeDefaultSqlitePath, DefaultSqlitePath, IValidateOptions, IsPathRooted,
GetFullPath) and nothing touching store or delete behaviour. Secrets.Ui is
byte-identical across the range: both assemblies are 39424 bytes and differ only
in the version stamp, because this package family shares one version across
every package even when a release touches only one of them. So the browser gate
run against the /admin/secrets delete modal on 0.2.3 still covers what ships
here.
The library default is LocalApplicationData-derived so the family's
cross-platform apps still boot locally. The gateway keeps its own
CommonApplicationData value, which always wins — see the note on
ApplyDefaultSecretsStorePath for why the difference is deliberate and why
deleting that method as a redundancy would silently move the store.
Rooted is not the same as safe, and the gap between the two cost a production
host every one of its API keys on 2026-08-09.
MxGateway:Authentication:SqlitePath was set to an absolute path inside the
directory the upgrade procedure renames to Server.bak.*. That passes the
existing rooted check cleanly. The deploy renamed the directory away, the store
went with it, and the gateway created a fresh empty one at the same path — no
error, no log line. No gRPC consumer could authenticate for two days. The deploy
itself was correct: the binaries were the point of the rename and the store was
collateral.
GatewayConfigPathRules gains AddIfUnderContentRoot, applied to the auth store
and the Galaxy snapshot. Both are written by the running process and both are
lost the same way. The rule compares resolved full paths and requires a
directory-separator boundary, so a sibling directory whose name merely starts
with the content root's ("/srv/app-data" against "/srv/app") is not treated as
inside it — on a fail-closed startup rule, that false positive would be a
gateway that refuses to boot on a legitimate path. Case sensitivity follows the
running OS rather than assuming case-insensitivity everywhere, which would
reject /srv/App as under /srv/app on Linux where they are different directories.
The rule is not exempted in Development. An environment-conditional guard is
never exercised where the mistake is made, and what failed in production was a
config that looked fine.
Secrets:SqlitePath is the same defect one layer down: it shipped as a bare
relative "mxgateway-secrets.db", which is how a stray database landed in
src/…Server/ and tripped the repository's tree-hygiene test. It is bound by the
shared ZB.MOM.WW.Secrets package, so appsettings.json now ships no value and the
default is computed from CommonApplicationData in code — the same mechanism
SEC-33 already used for the Galaxy snapshot, ten lines away, for the same reason.
Setting a default for an unset key is deliberately not the same act as
relocating a value someone configured, which these rules still refuse to do.
Note the migration edge this creates: a host relying on the old repo default now
looks somewhere new, finds nothing, and creates an empty store — this bug
re-introduced by its own fix. Deployed hosts are safe because they set the path
explicitly, in appsettings copied forward or in the service environment. The
latter is the more robust of the two, since it cannot be lost by a missed
preserve step.
Adds a `mxaccess-sessions` health check reporting how many MXAccess sessions are
healthy. Each session is one worker process holding one MXAccess COM instance —
a live connection into a Galaxy — so this answers "how many Galaxy connections
are healthy" in the vocabulary the code actually uses.
Zero sessions is Healthy, deliberately, and the rest of the design follows from
that. The gateway opens a session when a client asks and holds none otherwise,
so an idle gateway is working normally. A count threshold ("unhealthy below N")
would sit red forever on a host nothing dials yet, and a permanently red probe
is one operators stop reading — which leaves them worse off than no probe. The
check therefore grades on whether the sessions that exist are usable: nothing
faulted is Healthy, some faulted beside a ready or starting one is Degraded, and
every session faulted is Unhealthy. Counts ride along as entry data for the
family Overview dashboard.
Tagged `active` rather than `ready` for the same reason. Readiness decides
whether the process should be sent traffic, and a gateway with no sessions is
ready to serve — unlike the auth store, which every call depends on. Failing
readiness here would pull a working gateway out of rotation over a condition its
own clients create.
Reads ISessionRegistry, which already exposes Snapshot(); ISessionManager stays
the command surface and grows no enumerator.
Family-wide admin-UI cleanup pass (scadaproj admin_ui_cleanup.md) applied to the
Blazor dashboard. Behaviour is unchanged throughout — no @onclick, disabled,
binding, auth gate, or arm->confirm flow was touched.
Uncontrolled error text is now truncated at the render site. Fault messages,
Galaxy load errors, and browse-tree load failures were rendered in full into
fixed-width table cells, where a long exception string blows out the column.
Each site gets DashboardDisplay.Abbreviate plus a title attribute carrying the
untruncated text, so nothing becomes unreachable. Abbreviate is length-checked
rather than a bare range slice: `value[..n]` on a shorter string throws and
takes the whole page render down with it. The two detail views whose entire
purpose is to show one fault in full — SessionDetailsPage and GalaxyPage's
Last Error — are deliberately left untruncated.
Two classes referenced from markup had no definition anywhere in the sheet.
.browse-stale-banner was inert; .tree-load-status was a real visual defect —
loading and failed-to-load rows sit among .tree-row siblings and carry the same
leading .tree-toggle-empty spacer, but that spacer only takes its width as a
flex item, so without a flex container those rows lost their indent.
Confirm/cancel pairs in ConfirmDialog and the API-key create form are now
btn-groups with role="group" and an aria-label, replacing margin-spaced loose
buttons.
Removes a paragraph on GalaxyPage naming internal RPCs (DiscoverHierarchy,
GetLastDeployTime) — implementation detail with no meaning to a dashboard
operator.
Verified in a real browser, not bUnit: full build clean, 879/879 tests, and a
live gate against a running dashboard with a genuine ~250-char SqlClient
exception as the erroring row. Results per check, including the checks that
could NOT be exercised without an x86 worker, are recorded in
docs/plans/2026-08-11-dashboard-ui-sweeps.md.
That plan doc also records a correction: this app is NOT Bootstrap-free. The
sweep brief said it was, citing the scadaproj index; libman.json pins
bootstrap 5.3.3 and App.razor:7 links it ahead of the theme. The stale claim had
already cost this app one skipped family sweep (scadaproj#2, the /admin/secrets
modal), so that modal was live-gated here too and passes.
site.css declared `font-size: 0.82rem` literally on `.btn`. Bootstrap sizes
buttons through `font-size: var(--bs-btn-font-size)`, and `.btn-sm` /
`.btn-group-sm > .btn` do nothing but redefine that variable — so a literal at
equal specificity, loaded after Bootstrap, silently flattened every small button
in the dashboard into a padding-only difference. `btn-sm` was inert app-wide.
The kit now owns the sizing: 0.4.0 shipped the four `--bs-btn-*` overrides in
layout.css, which ThemeHead emits ahead of site.css, so removing the local
literal restores `.btn-sm` without a local copy. 0.4.1 is a pin-only follow-up
(it fixes `.rail-btn-block`, which this app does not use; `theme.css` is
byte-identical and the `.btn` rule is unchanged between the two).
The rest of the local rule is kept deliberately. 0.4.0 upstreamed sizing only,
not `border-radius` / `font-weight` / `white-space`, so deleting the block
wholesale would have dropped three app-specific declarations. `border-radius`
also stays a literal rather than `--bs-btn-border-radius`, because `.btn-sm`
redefines that variable and small buttons would shrink to Bootstrap's radius.
Verified in a browser against the running dashboard: `.btn` 13.6px and `.btn-sm`
12.48px, btn-group seams intact, and `--bs-btn-font-size` now declared in
exactly two sheets (bootstrap.min.css, layout.css) instead of three.
xUnit v2 (2.9.3) never invokes IAsyncDisposable.DisposeAsync on a test
class, so the unobserved-fault safety net this class documents — awaiting
every scripted worker task after each test — has been dead code since it
was written. Found via dumpasync on the wedged-testhost investigation: the
NeverReadyWorkerProcessLauncher's Task.Delay(Infinite, _stop.Token) was
still pending (DelayPromiseWithCancellation, detached) minutes after its
test finished, which is only possible if DisposeAsync never ran.
Proven both ways with a throw-probe in DisposeAsync: under IAsyncDisposable
all 3 tests pass (never called); under IAsyncLifetime all 3 fail from the
probe (called after every test). Sweep confirmed this is the only test
class on IAsyncDisposable — all other implementers are helpers disposed
via await using.
The windev full-suite wedge — every test reported, then the x64 testhost sitting
at ~0 CPU forever while `dotnet test` never returns — was one test blocked on a
pipe write, not a leaked thread or an undisposed fixture.
`dotnet-stack report` on the wedged host showed no thread running test code:
xUnit's RunTestsInAssembly was parked on WaitHandle.WaitOne() waiting for the
assembly-finished event, so the wait lived in a suspended async state machine.
`dotnet-dump analyze -c dumpasync` named the frame — WorkerClientTests
.StagingChannelOverflowFaultsWorkerWithoutWaitingForFullModeTimeout awaiting
WorkerFrameWriter.WriteAsync on a 63-byte frame, with <extra>5__15 = 6, i.e. the
seventh of the twelve events the test pushes past the client's staging bound.
That test faults the worker client on purpose, and a faulted client stops its
read loop by design. The test-side pipe came from the NamedPipeServerStream
overload without buffer arguments, which passes inBufferSize: 0 / outBufferSize: 0
to CreateNamedPipe; on Windows that reserves no buffer at all, so a write
completes only once the peer reads it. Measured on windev, that pipe absorbed
0 bytes against a non-reading peer where the same pipe declared with 64 KiB
buffers absorbed 65 520. On macOS and Linux .NET backs named pipes with Unix
domain sockets whose socket buffer swallows the writes regardless, which is why
the identical test never hung there and the bug read as environmental.
Test-owned server pipes now go through TestSupport/TestNamedPipe.CreateServer in
both test projects, declaring explicit 64 KiB buffers so those tests exercise the
gateway's own staging/queue backpressure rather than the OS pipe's flow control.
Separately, every fake-worker write in WorkerClientTests now goes through
PipePair.WriteAsync, bounded by the class's five-second TestTimeout. That is
where the severity came from: a test method that never returns keeps xUnit from
raising ITestAssemblyFinished, so one unbounded await cost the whole suite its
result. A blocked write is now a named test failure instead of a silent wedge.
The fix also retires a wrong belief the wedge had created. windev reported 855
where macOS reported 879, and that gap was recorded in GatewayTesting.md as
Unix-gated test cases; it was really the results lost when the wedged host was
torn down. The same clone now reports 879 passed, matching macOS exactly.
Product code is unaffected. SessionWorkerClientFactory.CreatePipe keeps the
unbuffered declaration deliberately: both ends run continuous read loops and every
gateway write is bounded by the worker client's _stopCts, so a stalled peer
cancels the write rather than blocking on it.
Verified on windev at this SHA: gateway suite x64 three times (879 passed,
exit 0, no surviving testhost each time) and Worker.Tests x86 twice (400 passed,
11 skipped, exit 0, clean), plus the macOS gateway suite once (879 passed).
Docs: GatewayTesting.md replaces the --blame-hang workaround section with the
root cause and corrects the baseline to 879, CLAUDE.md's Source Update Workflow
no longer tells readers the windev suite wedges, and ToolchainLinks.md records
dotnet-stack and dotnet-dump as installed on windev.
Both failures in the windev baseline were test bugs that reproduce on any Windows
host, not anything missing or misconfigured on windev.
SelfSignedCertificateProviderTests.GenerateCertificate_HasExpectedSansEkuAndValidity
asserted SAN content by substring-matching X509Extension.Format(false). That string
comes from the platform crypto library: Windows' CryptFormatObject renders the IPv6
loopback fully expanded (0000:0000:...:0001) where the managed formatter renders
"::1", so the loopback assertion could never hold on Windows. Decode the extension
with X509SubjectAlternativeNameExtension and compare parsed IPAddress values and DNS
names instead, which removes the platform-dependent formatting from the assertion.
SessionManagerTests.OpenSessionAsync_PipeNameIsShortAndUniquePerPidAndSession guards
the 104-byte macOS sun_path budget NEXT-01 shortened the pipe name to fit. It padded
the measured name up to a five-digit pid but never substituted that worst case
downward, so Windows' routine six-digit pids over-counted by a character against a
budget that does not constrain the host running the test. Substitute the five-digit
macOS worst case for the running pid's digit count so the check measures the name
format rather than the current pid.
EventStreamServiceTests.WaitUntilAsync now reports the unmet condition on timeout
instead of letting a bare TaskCanceledException escape. Its five-second real-clock
deadline is genuinely load-sensitive on windev (36 logical CPUs, maxParallelThreads
-1), and an opaque cancellation there is exactly what got the previous failures
filed as "environmental" and left unexplained.
Documents the windev run in docs/GatewayTesting.md: the two fixed bugs and their root
causes, the real-pipe suites whose failures are evidence of machine load rather than
of the change under test, and the full-suite testhost that completes every test and
then never exits (filtered runs exit normally; macOS exits cleanly). Corrects the
CLAUDE.md claim that the suite exits cleanly on the Windows dev box.
Root cause. The test sampled its flush baseline after a bare `Task.Delay(100)`
and then charged every later flush to the 128-event burst. Two facts make that
window unsound:
1. `RunHeartbeatLoopAsync` sends its first beat *immediately* on entering the
message loop — the far-off `HeartbeatInterval` only spaces later beats — so
the pre-burst frames are WorkerHello, WorkerReady, and a heartbeat, not the
two the test's comment assumed.
2. `WorkerFrameWriter.DrainQueuedFramesAsync` flushes *after* writing a drained
batch, so the bytes reach the pipe before the flush runs. Reading a frame off
the gateway side is therefore no evidence that its flush has been counted,
and no sleep makes it evidence.
Under load on the shared windows-x86 runner the first heartbeat's flush was
scheduled after the 100 ms sample, so it landed inside the measured window and
the assertion saw two flushes for the burst — exactly the observed
`Expected: 1 / Actual: 2` (Gitea run 675, job 2558, and the same failure since
a346d51). Nothing about the coalescing behavior was wrong; only the test's
timing assumption.
Fix. Replace the sleep with explicit synchronization, no widened timeouts.
`FlushCountingPassthroughStream` now records the flush *shape* — the number of
stream writes coalesced into each flush — and exposes
`WaitForAllWritesFlushedAsync`, a TaskCompletionSource signal released when the
next flush drains the pending writes. The test reads the first heartbeat (the
last pre-burst frame), waits for its flush, and only then samples the baseline;
after the burst it takes the same edge before asserting. The assertion is also
sharpened from a bare count to the shape: exactly one flush beyond the baseline
*and* that flush carried all 128 event frames, so a split batch fails even if
the reader observes it mid-split.
docs/WorkerFrameProtocol.md notes the peer-visible ordering the fix turns on:
frames reach the pipe before the flush that follows them, so an observer of the
flush must wait for it rather than infer it from frames arriving.
A periodic reconcile can synthesize a repair transition whose matching live
transition is still buffered in the alarm lease; both then broadcast as
indistinguishable duplicates on StreamAlarms and the dashboard hub. Nothing
serializes the two paths, and a correct serialization needs a worker-side
high-water mark on QueryActiveAlarms (proto + worker change + a stall path),
so this closes the common case with a local best-effort dedup instead: both
paths already carry the same worker-derived identity — the worker stamps
record.TransitionTimestampUtc into both OnAlarmTransitionEvent's
transition_timestamp and ActiveAlarmSnapshot.last_transition_timestamp — so
ApplyTransition suppresses a live transition whose (timestamp, resulting
state) the cache already carries from a repair. The Clear leg has no cache
entry left to compare, so ApplyReconcile tombstones each synthesized Clear by
the instance's original_raise_timestamp for one reconcile generation; a
matching live Clear consumes the tombstone, while a new raise/clear cycle
carries a newer raise timestamp and passes. Suppression fires only on a
positive marker match — unset timestamps keep today's behavior — so the
documented at-least-once consumer contract stands (gateway.md, Sessions.md
updated in the same change).
Tests: two new regressions drive the exact race through the GWC-26 harness
(repair-then-buffered-live for Raise and for Clear, each with a genuine
follow-up transition proving no over-suppression); GatewayAlarmMonitor
suites 18/18.
A WriteAsync/WriteBatchAsync caller cancelled after the draining lock-holder
claimed its frame unwinds without awaiting that frame's completion; the same
holds for a frame already faulted by a concurrent FailAllQueued, where
TrySetCanceled loses. A later wire-write failure then lands TrySetException on
a task with no awaiter and surfaces as TaskScheduler.UnobservedTaskException.
The tombstone helpers now attach a fault-observing continuation to every frame
in the cancelled call (a cancelled task never fires OnlyOnFaulted, so
unconditional attach is safe), outside _gate because an already-faulted task
runs the continuation inline.
NEXT-05 is resolved as a documented decision, not a code change: tombstoned
entries keep their lazy DequeueNext purge — any subsequent write drains both
queues to empty and the heartbeat loop bounds residency to one interval, while
eager Queue<T> rebuilds under _gate would add ordering-invariant surface for
no gain. Rationale recorded in docs/WorkerFrameProtocol.md alongside the
WRK-22 residual-window contract.
New regression test drives the exact abandonment: gated stream holds writer A
mid-write, the queued event frame is claimed and blocked mid-write, its caller
is cancelled, the write then faults with a marker exception, and the test
asserts the marker never reaches UnobservedTaskException after a forced GC.
net48 x86 build/test runs on windev with the rest of this batch.
The pipe name mxaccess-gateway-{pid}-session-{32hex} plus .NET's
CoreFxPipe_ prefix overflowed the 104-byte Unix-domain-socket path limit
under the default per-user macOS TMPDIR (~49 chars), so every test that
opened a real pipe threw ArgumentOutOfRangeException at pipe creation
unless TMPDIR=/tmp was exported. Rename to mxgw-{pid}-{sessionUid} (the
session guid hex without the session- prefix; worst-case 43 chars) and
shorten the three test-fixture names the same way. Uniqueness is
unchanged: gateway pid + full session guid. The worker receives the pipe
name via its launch command line, so mixed Server/Worker deploy SHAs are
unaffected. Docs updated in the same change (gateway.md,
GatewayProcessDesign, GatewayConfiguration, Sessions, CLAUDE.md); new
regression test pins the format and the length budget.
Verified: SessionManagerTests 39/39; SessionWorkerClientFactory,
GatewayEndToEndFakeWorkerSmoke, WorkerClient, and ReconnectReplay suites
33/33 under the default macOS TMPDIR — this also retires the
previously-misdiagnosed 'macOS pipe-timeout test failures': they were
this path-length throw, not a timeout-message defect.
MSBuildThisFileDirectory ends in a backslash, which escaped the closing quote
of the Exec command on Windows; git then failed and, because the target runs
with ContinueOnError + ConsoleToMSBuild (which mixes stderr into
ConsoleOutput), the failure text was stamped as the source revision — an
observed stamp read '0.1.2+fatal: cannot change to ...'. Append '.' to the
quoted path so the trailing separator can no longer escape the quote, and
gate SourceRevisionId on a short-SHA shape so no future git failure text can
become the revision either. Windows verification runs on windev with the
rest of this batch; macOS stamp confirmed unchanged (0.2.0+75c71ad).
OtOpcUa's dominant FreeAccess write path goes out as MX_COMMAND_KIND_WRITE,
not WriteSecured — the original 06/S-1 brief mis-scoped the correlation, so
a refused plain write was invisible on the unary reply (verified live on
windev 2026-08-09). ExecuteWrite/ExecuteWrite2 now use the same pre-call
version baseline + bounded pump-wait as the secured kinds. Bulk writes stay
fire-and-forget.
The suite's fixtures had drifted from the shared GLAuth config, so a green run
proved nothing about the service-account bind: the only success-path test used
admin/admin123, but the directory's admin carries the standard dev password, and
the "not an admin" test used a readonly user that does not exist there at all --
it passed via the user-not-found branch rather than the group-missing branch it
names.
Realign to real users from scadaproj/infra/glauth/config.toml: admin/password
(othergroups include GwAdmin, gid 5610) for the success path, and
gw-viewer/password (GwReader only, gid 5611) for the bind-succeeds-but-no-role
path. Both are published dev credentials documented in glauth.md, not secrets.
The gw-viewer test drops its old no-leak assertion on the credential literal:
the real password is the word "password", which legitimately occurs in the
generic denial text, so the check would fail for the wrong reason. The no-leak
property is still covered with a distinctive literal by the wrong-password test.
In its place the test now asserts the property this fixture is uniquely able to
prove -- an authorization failure must be reported with the same message as an
authentication failure, so it cannot be used to enumerate valid accounts.
appsettings ships Server=localhost, so document the MxGateway__Ldap__Server
override the suite needs to reach the shared GLAuth alongside the existing
MXGATEWAY_RUN_LIVE_LDAP_TESTS and ServiceAccountPassword variables.
Verified live: Failed: 0, Passed: 5 against 10.100.0.35:3893.
The blanket loop asserted HRESULT/Statuses/ReturnValue on every command_replies fixture, but the authenticate-user.* fixtures added for the malformed-reply and credential-redaction contracts deliberately omit them (NRE on ReturnValue.DataType). Keep universal Kind/ProtocolStatus invariants for all; apply the MXAccess-detail block only to fixtures that carry it. Test-only.
Joseph Doherty