# UDPClusterManagerOptions.useAliveCheck property · @imqueue/core

Source: https://imqueue.org/api/core/latest/core.udpclustermanageroptions.usealivecheck/
Published: 2026-08-04
Author: @imqueue maintainers (https://github.com/imqueue)
Package: @imqueue/core 3.3.2 — generated reference, not hand-written

Whether announced servers are expired when they stop broadcasting.

**Signature:**

```typescript
useAliveCheck: boolean;
```

## Default Value

true

## Remarks

When disabled, a server is removed only on an explicit `down` announcement — so a host that dies silently is never removed and keeps receiving round-robin sends.

The default can be overridden with the `IMQ_UDP_CLUSTER_MANAGER_ALIVE_CHECK` environment variable, which is read as a number when the module loads: use `1` to enable and `0` to disable. Any non-numeric value — including the word `true` — is read as disabled.