GetElasticsearch processor invokes elasticsearch GET api without an identifier when flow file is null

        FlowFile input = null;
        if (context.hasIncomingConnection()) {
            input = session.get();

            // If we have no FlowFile, and all incoming connections are self-loops then we can continue on.
            // However, if we have no FlowFile and we have connections coming from other Processors, then
            // we know that we should run only if we have a FlowFile.
            if (input == null && context.hasNonLoopConnection()) {
                return;
            }
        }