---
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title: Error Restarting Agent, Already Listening on a Configured Port
description: Datadog, the leading service for cloud-scale monitoring.
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  Docs > Agent > Agent FAQ > Error Restarting Agent, Already Listening on a
  Configured Port
---

# Error Restarting Agent, Already Listening on a Configured Port

When attempting to restart the Agent, you may encounter this error:

```text
Error: Another program is already listening on a port that one of our HTTP servers is configured to use. Shut this program down first before starting supervisord.
```

This indicates that the Agent did not shut down correctly.

To resolve this issue, take the following steps:

1. Stop the Agent:

   ```text
   sudo /etc/init.d/datadog-agent stop
   ```

1. Confirm that there are no processes running for the user `dd-agent` after stopping:

   ```text
   top -U dd-agent
   ```

Kill any processes running under `dd-agent`, if you find any.

1. Start the Agent again.

   ```text
   sudo /etc/init.d/datadog-agent start
   ```

If this doesn't solve your issue, reach out to [Datadog Support](https://docs.datadoghq.com/help/).

- [Learn more about the Datadog Agent](https://docs.datadoghq.com/agent/)