The version 0.3.3 of the IsoMap application has been releases some days ago. With this version Java 1.8 is fully supported and the dependency to the GeoServer has been removed
The automatic and static source code analysis system is now compatible with java 1.8. Therefore, the server backend and the IsoMap application are now implemented using the new Java version.
Another improvement of this release is that it does not need GeoServer as a dependency anymore. The conversion to GeoJSON is now done directly in PostGIS and not in GeoServer anymore.