3.12. Problem: Multiple Ambari Agent processes are running, causing re-register

On a cluster host ps aux | grep ambari-agent shows more than one agent process running. This causes Ambari Server to get incorrect ids from the host and forces Agent to restart and re-register.

3.12.1. Solution

On the affected host, kill the processes and restart.

Kill the Agent processes and remove the Agent PID files found here: /var/run/ambari-agent/ambari-agent.pid.
Restart the Agent process:
```
ambari-agent start
```

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