Should alt-host in transactor.properties also be identical in a HA setting?

I'm guessing not..

To enable HA, simply run two transactor processes on separate machines, with identical transactor properties files (in particular, configured to use the same storage.)

The host and alt-host should point to the IP of that currently running transactor. Usually it is some public IP and an internal IP in them. Two HA transactors should have different IP:s. The IP:s are written to the back storage by the transactor, and the connected peers deduce which transactor that is the active one from some protocol based on the transactors writing heartbeats to the back storage. And uses the IP:s from the backstore to connect to the active transactor. The backstore serves as a "transactor service discovery" as well as some kind of liveness check which implicitly decides which transactor that is really alive.

(by "HA transactor" I mean two or more transactors running against the same backstorage, which gives high availiability to the transactor service).

OK, thanks! As far as I understand then the documentation regarding identical transactor properties files is then incorrect. I think that this should be corrected.

I am encountering a strange OutOfMemoryError for a relatively simple query. I don't think it creates a cross product. Any suggestions on why this would happen? https://gist.github.com/ivarref/7059a0fe79b3353187dad9e187928da0.