Java synchronization between different JVMs

Question

The project I am working on would trigger various asynchronous jobs to do some work. As I look into it more these asynchronous jobs are actually being run as separate JVMs (sepa

Answer 1

they are all thread-level?

That's correct, synchronized etc only work within the context of a single process.

Does Java provide support for IPC like semaphores between processes?

One way to implement communication between Java processes is using RMI.