Symptom

Going to any view will show no topology results. A long error appears in the stackstate.log, beginning with:

[StackStateGlobalActorSystem-akka.actor.default-dispatcher-92] ERROR com.stackstate.plugins.sts.topology.StsTopologyService - Error in identity extractor
com.stackstate.domain.script.ScriptExecutionException: Script threw error. null. Script: '
...

Cause

StackState version 4.1 installed in a Linux environment running JDK 11.

Solution

JDK versions 9 or higher are not currently supported. See the StackState Requirements for Linux servers.