KIE server is running in un-managed mode.We can add scanner using the below REST api:
http://localhost:8080/kie-server/services/rest/server/containers/containerID}scanner
~~~
<kie-scanner status="STARTED" poll-interval="20"/>
~~~
Scanner is working fine, but if we restart server instance scanner information is not retained.
Request:
~~~
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<script>
<get-scanner-info container-id="TestContainer"/>
</script>
~~~~
Response:
~~~~
<responses>
<response type="SUCCESS" msg="Scanner info successfully retrieved">
<kie-scanner status="DISPOSED"/>
</response>
</responses>
~~~~~

The root cause is that the scanner information is not stored on via the KIE Server store. So after restart, the scanner is defaulted to STOPPED state.