Coincidentally, I just tried this out earlier today. `pageRank` yielded a stack overflow, and `pageRank.stream` yielded an OOM error. The graph it was run on was large, but not unreasonably so. Haven't dug into the cause of the errors yet.
This is likely a query issue; I've had many queries go wild & OOM, once fixed they work as you'd expect. There's also a config setting you can use to limit in seconds the amount of time a query can run before it's killed, very useful if you plan on running hand built queries on anything production (which you shouldn't be anyways ;-))
