CICS ABEND refers to abnormal termination conditions that occur when a CICS transaction or program encounters an unexpected error or failure. Understanding ABENDs is crucial for effective error handling and system recovery in CICS environments.
An ABEND (Abnormal End) in CICS occurs when a transaction or program terminates unexpectedly due to an error condition that cannot be handled normally. Unlike normal program completion, an ABEND represents a failure that requires investigation and potentially corrective action.
System ABENDs occur due to system-level problems such as:
User ABENDs are intentionally generated by programs using:
CICS-specific ABENDs include:
The HANDLE ABEND command allows programs to intercept and handle ABEND conditions:
1234EXEC CICS HANDLE ABEND PROGRAM('ERROR-PROGRAM') RESP(WS-RESPONSE) END-EXEC.
Error handling programs can:
CICS provides automatic recovery mechanisms:
Manual recovery procedures include:
CICS provides dump analysis tools to help diagnose ABEND causes:
Monitoring tools help track ABEND patterns:
Imagine you're playing with building blocks:
When you're building something with blocks, sometimes things go wrong. Maybe you try to put a block where it doesn't fit, or you accidentally knock over your tower. That's like an ABEND in CICS!
An ABEND is when a computer program (like your building project) stops working because something unexpected happened. Maybe the program tried to use memory it wasn't allowed to use, or it tried to do something impossible.
Just like when your tower falls down, the computer needs to clean up the mess and figure out what went wrong. Sometimes it can fix itself, and sometimes a grown-up (like a programmer) needs to help figure out what happened and how to prevent it next time.
Match the following ABEND codes with their descriptions:
Answer: S0C1 occurs when an invalid operation code is encountered, S0C4 when accessing protected storage, S0C7 when data format is invalid, and AEI1 when an invalid transaction ID is used.
Design an error handling strategy for a CICS program that processes customer data. What ABEND conditions should be handled, and how would you implement recovery?
Answer: Handle storage exceptions (S0C4), data exceptions (S0C7), and CICS-specific errors (AEIx). Implement logging, resource cleanup, user notification, and graceful termination with appropriate error messages.
What does ABEND stand for?
Answer: B) Abnormal End
Which ABEND code indicates a storage protection violation?
Answer: B) S0C4