For z/OS platforms

Automatic restart management (ARM)

Liberty uses the IBM® z/OS® automatic restart management (ARM) to recover application servers. For Liberty and angel, you must configure with an ARM group. Each registration uses a special element type that is called SYSCB, which ARM treats as restart level 3, assuring that RRS restarts before any application server.

If you have an application that is critical for your business, you need facilities to manage failures. z/OS provides rich automation interfaces, such as ARM, that you can use to detect and recover from failures. ARM handles the restarting of servers when failures occur.

Tips:
  • If ARM is enabled on your system, you might want to disable ARM for the Liberty address spaces before you install and customize Liberty. During configuration, job errors might cause unnecessary restarts of the Liberty address spaces. After installation and configuration, consider enabling ARM.
  • If you are ARM-enabled and you cancel or stop a server, the server restarts in place by using the armrestart command.