S5: the old JetStream client's no response from the stream is a request that reached no one (issue 1966, ADR 0668 §1; review round 1, finding 2)

The node-engine's natsLink publishes through the old client, which says no responders as nats.ErrNoStreamResponse: sayOnce gave up at once.

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

go/busretry/busretry.go

@@ -43,7 +43,8 @@ func Waits(bound, first, most time.Duration) (restore func()) {
 }
 
 // Undelivered says err means the request reached no one: no responders, JetStream not enabled (for the account), or
-// no response from the stream after the client's own retries on no responders; also said in words by a runtime that
+// no response from the stream after the client's own retries on no responders (either JetStream client's: the old
+// one's publish says it for no responders, review round 1 of issue 1966); also said in words by a runtime that
 // passed the error on.
 func Undelivered(err error) bool {
 	var answered *Answered
@@ -52,6 +53,7 @@ func Undelivered(err error) bool {
 	}
 	if errors.Is(err, nats.ErrNoResponders) || errors.Is(err, jetstream.ErrJetStreamNotEnabled) ||
 		errors.Is(err, jetstream.ErrJetStreamNotEnabledForAccount) || errors.Is(err, jetstream.ErrNoStreamResponse) ||
+		errors.Is(err, nats.ErrNoStreamResponse) ||
 		errors.Is(err, nats.ErrJetStreamNotEnabled) || errors.Is(err, nats.ErrJetStreamNotEnabledForAccount) {
 		return true
 	}

go/busretry/busretry_test.go

@@ -37,6 +37,7 @@ func TestABusThatAnswersNothingIsWaitedOut(t *testing.T) {
 		{"repeatable: no responders with no probe, then an answer", []error{nats.ErrNoResponders, nil}, nil, 2, 2, true, true},
 		{"repeatable: a callee's answer is an answer", []error{&Answered{Words: "context deadline exceeded"}}, nil, 1, 1, false, true},
 		{"repeatable: nobody answers and the probe says the bus answers", []error{nats.ErrNoResponders}, func() bool { return false }, 1, 1, false, true},
+		{"repeatable: no response from the stream, either client's, then an answer", []error{nats.ErrNoStreamResponse, jetstream.ErrNoStreamResponse, nil}, nil, 3, 3, true, true},
 		{"timed out past the bound: said", []error{context.DeadlineExceeded}, nil, 2, 1000, false, true},
 	} {
 		// A row that ends in an answer waits on a bound of seconds, which no slow machine reaches; only the row that