If you start using domain.sh, "ObjectStore" and "PutObjectStoreDirHere" directories appear at the same level as bin, domain, standalone. They should be in domain/servers/XXXX/data where XXXX is the name of the server.

I don't see any jbossts related directories if standalone.sh is used.

I did some tracing of the path string being injected into o.j.as.tx.ArjunaTransactionManagerService's pathInjector, and it's the expected /pathToJBoss/domain/servers/XXXX/data/tx-object-store. Beyond that I don't know what happens.