Looking at your workaround, I think you actually set the response
mode to GET_NONE (because that's the default value in RequestOptions), so you're
back to sending an asynchronous request.
That was my question as well:
Shouldn't this "synchronous" flag still be used?
https://github.com/Sanne/hibernate-search/blob/077f29c245d2d6e960cd6ab59f...
e.g.
if (synchronous) {
int size = dispatcher.getChannel().getView().getMembers().size();
RequestOptions options = RequestOptions.SYNC();
options.setRspFilter( new WaitAllFilter( size ) );
} else {
options = RequestOptions.ASYNC();
}