[z/OS]

RRS automation and recovery scenarios

Use this table for RRS automation and recovery scenarios.

Table 1. RRS automation and recovery scenarios. Although RRS restart and resource manager restart are two separate items, they must be considered together because in many instances RRS restart issues have a major effect on resource manager restart issues. For additional information, read about the RRS restart and recovery section in the Systems Programmer's Guide to Resource Recovery Services (RRS) book.
Task RRS automation and recovery scenarios
Startup Ensure System Logger has been started before RRS.
Note: RRS will display error messages indicating that System Logger must be started first if you try to start RRS without starting System Logger.
Ensure RRS is started before WebSphere® for z/OS®. RRS does not start by itself. RRS will start automatically only if it was registered with the Automatic Restart Manager (ARM) and if ARM is running. To start RRS, issue the start command:
start atrrrs,sub=master
Note: RRS doesn't restart itself if you issue the cancel command, so you need to restart it manually if it was canceled or if ARM isn't running.
Shutdown Shutdown RRS in the reverse order that you started RRS. Shutdown WebSphere Application Server for z/OS, then RRS, followed by System Logger. There is no controlled way to bring down RRS. The best approach is:
  1. Quiesce WebSphere Application Server for z/OS.
  2. Shutdown WebSphere Application Server for z/OS.
  3. Cancel RRS.
    Note: You may want to bring down the DB2® you are using for WebSphere Application Server for z/OS before canceling RRS.
To cancel RRS, issue the command:
setrrs cancel
Handling in-flight and indoubt transactions if there is a failure Refer to the RRS system management panels to display in-flight and resolve indoubt transactions. You can display the resource managers on the RM panels in RRS, display all units of recovery (UR), filter the URs, and then resolve the indoubts. You cannot resolve in-flights. You can display all RRS-managed transactions.

If you are using the IMS™ Connector for Java™, this process applies only if IMS Connector for Java, IMS Connect, and the IMS subsystem are configured locally on the same z/OS system image on which the WebSphere for z/OS J2EE server runs. The local configuration is the only configuration in which IMS Connector for Java runs as an RRS-transactional connector.

How to determine if RRS is running Use the display command:
d a,atrrs
atrrs is the name of the default RRS procedure shipped with WebSphere Application Server for z/OS. Use the procedure name that you use to start RRS. The address space comes from the procedure.
What happens to WebSphere for z/OS if RRS goes down? RRS is a required subsystem, so WebSphere Application Server for z/OS will not run without it. If RRS goes down, WebSphere Application Server for z/OS will get fatal errors. You need to get RRS started, then restart WebSphere Application Server for z/OS.
What happens to other subsystems if RRS goes down? RRS is the WebSphere Application Server for z/OS transaction monitor. If you cancel RRS, you will have problems with any subsystems using it (for example, WebSphere Application Server for z/OS, DB2, IMS). You should understand the implications before you cancel RRS.
Where to find more information z/OS MVS™ Programming: Resource Recovery

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