I've created some entities via /bulk and can get them back via /traversal. But when i call /graph i get back: IOException: Pipe not connected Error message: - https://gist.github.com/garethahealy/0a7d7403f329d8768ab4cab4dcf2c409 After a bit of debugging, i believe its because the InputStream [1] hasn't been fully written to, as the graph is retrieved on another thread [2], which means the REST call has returned and closed. [1] https://github.com/hawkular/hawkular-inventory/blob/master/hawkular-inven... [2] https://github.com/hawkular/hawkular-inventory/blob/master/hawkular-inven... Should this endpoint not use a latch/wait or AsyncResponse.resume like the metrics APIs does? As i am able to get the graph back, if i keep the connection alive via debug checkpoints. Cheers.