jinterface: mbox==thread or thread(mbox)?

[ingo.schramm]

Writing a bridge from Erlang to neo4j (nerlo) I come around the
problem of threading at the Java side. My question is: does a new
OtpMbox run in a separate thread already (similar to spawn()) or do I
have to create a new thread containing a new OtpMbox?

Is anything known about problems in conjunction with jinterface,
multithreading and multiple mboxes?

Cheers,
Ingo