Hi,

I am in a case where the index backend has been incorrectly configured to Elasticsearch. Now, when I try to instantiate my graph database, I get a "ConnectException: Connection refused", even if I set('index.search.backend', 'lucene') in JanusGraphFactory.
The setting index.backend is global offline, I should update it when the graph is instantiated but how can I change it if the instantiation fails ?

Thanks