This topic applies only on the z/OS operating system.

CICS automation and recovery scenarios

This article explains different scenarios for CICS automation and recovery.

Task CICS automation and recovery scenarios
Startup CICS and any required CICS products, such as CICS Transaction Gateway, need to be properly installed, initialized, and started before any work flows to a CICS-enabled WebSphere Application Server controller.
Shutdown Shutdown the WebSphere Application Server controller that uses CICS as a backing store, then shut down the CICS service.
Handling in-flight or indoubt transactions if there is a failure If there is an error during processing, both CICS and WebSphere Application Server for z/OS rely on the underlying RRS subsystem to handle all rollback notifications to the registered interests. In the case of inflight transactions, RRS will notify all participants that a rollback is required, and normal rollback processing will occur in each registered party. In the case of indoubt transactions, it may be necessary to recycle the WebSphere Application Server for z/OS Application Control/Server region to release any pending transaction in CICS.
How to determine if CICS is running This is installation dependent.
What happens to CICS if WebSphere Application Server for z/OS goes down? Should WebSphere Application Server for z/OS happen to go down, one of two situations could occur:
  1. If WebSphere Application Server for z/OS and CICS are currently engaged in a unit of work, then RRS processing as described above would occur and it may be necessary to recycle the application control server regions to release pending transactional work in CICS.
  2. If WebSphere Application Server for z/OS and CICS are not currently engaged in a unit of work, CICS is not affected.
What happens to other subsystems if CICS goes down? Not applicable
Where to find more information CICS Operations and Utilities Guide



Related tasks
Diagnosing problems (using diagnosis tools)
Related reference
Automation and recovery scenarios and guidelines
Reference topic    

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