tested against jdk8-fsc-b129 (don't know which version that is in the combo above ;-)

Looks like a JavaBeanProperty is never garbage collected. The snippet below (full working example and further details at SO http://stackoverflow.com/a/21579555/203657 ) creates a bunch of adapters just for local fun, they build up in memory and there's no way - at least I couldn't fine any - to get rid of them again.

    @Override
    public void handle(ActionEvent paramT) {
        Property propertyFX;
        for (int i = 0; i < 100000; i++) {
            propertyFX = createCountProperty();
        }
        LOG.info("created 100k adapters");
    }

    protected JavaBeanDoubleProperty createJavaBeanProperty(){
        try {
            return JavaBeanDoublePropertyBuilder.create()
                    .bean(counter).name("count").build();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
        return null;
    }

This behaviour was introduced sometime during jdk8.