Jakarta CRaC

Jakarta CRaC defines a standard behaviour for Jakarta EE applications and runtime for checkpoint and restore events.

The CRaC (Coordinated Restore at Checkpoint) Project researches coordination of Java programs with mechanisms to checkpoint (make an image of, snapshot) a Java instance while it is executing. Restoring from the image could be a solution to some of the problems with the start-up and warm-up times.

Jakarta CRaC defines how to make the runtime aware of a checkpoint being taken and when it is being restored. It also defines a way for application developers to give instructions to the runtime how to handle external resources used by the application.