netbirdio/netbird · error

add netlink monitor: %w

Error message

add netlink monitor: %w

What it means

Error "add netlink monitor: %w" thrown in netbirdio/netbird.

Source

Thrown at client/firewall/nftables/external_chain_monitor_linux.go:150

			}
			if !isRelevantMonitorEvent(ev) {
				continue
			}
			resetDebounce(debounce, pending)
			pending = true
		}
	}
}

func (m *externalChainMonitor) subscribe() (chan *nftables.MonitorEvent, func(), error) {
	conn := &nftables.Conn{}
	mon := nftables.NewMonitor(
		nftables.WithMonitorAction(nftables.MonitorActionNew),
		nftables.WithMonitorObject(nftables.MonitorObjectChains|nftables.MonitorObjectTables),
	)
	events, err := conn.AddMonitor(mon)
	if err != nil {
		return nil, nil, fmt.Errorf("add netlink monitor: %w", err)
	}
	return events, func() { _ = mon.Close() }, nil
}

// resetDebounce reschedules a pending debounce timer without leaking a stale
// fire on its channel. pending must reflect whether the timer is armed.
func resetDebounce(t *time.Timer, pending bool) {
	if pending && !t.Stop() {
		select {
		case <-t.C:
		default:
		}
	}
	t.Reset(externalMonitorReconcileDelay)
}

func (m *externalChainMonitor) reconcile() {
	if err := m.reconciler.reconcileExternalChains(); err != nil {

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/firewall/nftables/external_chain_monitor_linux.go:150 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of netbirdio/netbird@93e97f4bf1 (2026-08-16). Data as JSON: /api/errors/f06571ab6d17bf2d. Report an issue: GitHub.