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buildrun: an ask the build seat gave up on ends its asker's wait as failed with why, for every asker of the build seats (issue 734)

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The checker's try and the builder's lanes waited for ever on an ask given up during a bus reload: no build node writes a
step for it. LostAskWaiter hands the asker a failed step on the node bus when DEAD_LETTERS keeps the ask's copy
(HearDeadLetters, granted by DeadLetterReads), and under NotTakenBound when no node took the ask within the bound.
This commit is contained in:
jschoubben
2026-10-26 14:00:46 +01:00
parent e7f0dc612e
commit d96b9fd660
2 changed files with 325 additions and 0 deletions
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go/delivery/buildrun/asks_test.go
+29
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@@ -48,6 +48,35 @@ func TestAnAskerPutsOnceAndReadsTheStep(t *testing.T) {
if len(g.Asks()) != 0 {
t.Fatal("a wait put an ask")
}
// Issue 734: an ask the build seat gave up on (DEAD_LETTERS keeps its copy with the ask's id) ends its wait as failed
// with the words, though a node had taken it; under NotTakenBound one no node takes ends at the bound; a step written
// first is answered as the node wrote it.
dead := &DeadLetters{}
lw := LostAskWaiter{Inner: g, Dead: dead}
k = Asker{Publisher: g, Waiter: lw, Bound: time.Minute}
g.Write(delivery.Step{ID: "mvl0frv18d1970", Node: "ace", State: delivery.StepRunning, Started: time.Now()})
given, ok := GivenUpOf(map[string][]string{"Mesh-Dead-Msg-Id": {"mvl0frv18d1970"}, "Mesh-Dead-Deliveries": {"5"},
"Mesh-Dead-Stream": {"SEAT_NODE_BUILD_GO"}, "Mesh-Dead-Gave-Up": {"2026-10-26T12:26:40Z"}})
if !ok {
t.Fatal("a dead letter's headers were not read")
}
go dead.Heard(given)
step, err = k.Wait(context.Background(), goAsk("mvl0frv18d1970"))
if err != nil || step.State != delivery.StepFailed || !IsLost(step) ||
!strings.Contains(step.Reason, LostWords+" after 5 deliveries at 2026-10-26T12:26:40Z") {
t.Fatalf("a given-up ask: %+v, %v", step, err)
}
if _, err := k.Passed(step, nil); err == nil || !strings.Contains(err.Error(), "on "+LostNode+" failed: "+LostWords) {
t.Fatalf("a given-up ask's error: %v", err)
}
step, err = k.Wait(NotTakenBound(context.Background(), 20*time.Millisecond), goAsk("mvl0frv18d1971"))
if err != nil || !IsNotTaken(step) || IsLost(step) {
t.Fatalf("an ask no node took: %+v, %v", step, err)
}
g.Write(delivery.Step{ID: "mvl0frv18d1972", Node: "g14", State: delivery.StepPassed})
if step, err = k.Wait(NotTakenBound(context.Background(), time.Minute), goAsk("mvl0frv18d1972")); err != nil || step.Node != "g14" {
t.Fatalf("a step written: %+v, %v", step, err)
}
}
// Review (issue 734 path): an ask taken again by the same node (its build module replaced mid-run) is bounded from the