[FIXED] Queue subscriptions not able to receive system events.

The issue was caused by the kind of connections being checked.

Resolves #1527

Signed-off-by: Ivan Kozlovic <ivan@synadia.com>

server/client.go

@@ -3567,11 +3567,11 @@ func (c *client) processMsgResults(acc *Account, r *SublistResult, msg, deliver,
 	// Declared here because of goto.
 	var queues [][]byte
 
-	// For all non-client connections, we may still want to send messages to
+	// For all routes/leaf/gateway connections, we may still want to send messages to
 	// leaf nodes or routes even if there are no queue filters since we collect
 	// them above and do not process inline like normal clients.
 	// However, do select queue subs if asked to ignore empty queue filter.
-	if (c.kind != CLIENT && c.kind != JETSTREAM && c.kind != ACCOUNT) && qf == nil && flags&pmrIgnoreEmptyQueueFilter == 0 {
+	if (c.kind == LEAF || c.kind == ROUTER || c.kind == GATEWAY) && qf == nil && flags&pmrIgnoreEmptyQueueFilter == 0 {
 		goto sendToRoutesOrLeafs
 	}
 

server/events_test.go

@@ -1814,3 +1814,38 @@ func TestConnectionUpdatesTimerProperlySet(t *testing.T) {
 		return nil
 	})
 }
+
+func TestServerEventsReceivedByQSubs(t *testing.T) {
+	s, opts := runTrustedServer(t)
+	defer s.Shutdown()
+
+	acc, akp := createAccount(s)
+	s.setSystemAccount(acc)
+
+	url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
+	ncs, err := nats.Connect(url, createUserCreds(t, s, akp))
+	if err != nil {
+		t.Fatalf("Error on connect: %v", err)
+	}
+	defer ncs.Close()
+
+	// Listen for auth error events.
+	qsub, _ := ncs.QueueSubscribeSync("$SYS.SERVER.*.CLIENT.AUTH.ERR", "queue")
+	defer qsub.Unsubscribe()
+
+	ncs.Flush()
+
+	nats.Connect(url, nats.Name("TEST BAD LOGIN"))
+
+	m, err := qsub.NextMsg(time.Second)
+	if err != nil {
+		t.Fatalf("Should have heard an auth error event")
+	}
+	dem := DisconnectEventMsg{}
+	if err := json.Unmarshal(m.Data, &dem); err != nil {
+		t.Fatalf("Error unmarshalling disconnect event message: %v", err)
+	}
+	if dem.Reason != "Authentication Failure" {
+		t.Fatalf("Expected auth error, got %q", dem.Reason)
+	}
+}