What is CICS ISSUE ABEND command used for?

CICS ISSUE ABEND is used to trigger abnormal termination of programs or transactions, providing controlled termination capabilities for error handling and system management.

What types of abends can be issued?

Abend types include user-defined abends (custom termination logic), system abends (system-generated), conditional abends (condition-based), and emergency abends (emergency termination).

How do I handle errors with CICS ISSUE ABEND?

Always check the response code and implement appropriate error handling, including validation of abend requests, proper cleanup procedures, and recovery mechanisms.

What is the purpose of abend control?

Abend control enables controlled termination of programs, error handling, system stability maintenance, resource cleanup, and transaction integrity preservation in CICS environments.

When should I use CICS ISSUE ABEND?

Use this command when serious error conditions occur that cannot be handled normally, when system integrity is compromised, or when controlled termination is required for error recovery.

CICS ISSUE ABEND - Abnormal Termination Control

CICS ISSUE ABEND provides abnormal termination control for programs and transactions. It enables programs to trigger abnormal termination, manage abend conditions, and handle abnormal termination scenarios in CICS environments.

What is CICS ISSUE ABEND?

CICS ISSUE ABEND is a command that allows programs to trigger abnormal termination of programs or transactions. It provides controlled abnormal termination capabilities, error handling, and termination management for CICS applications.

Command Syntax

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EXEC CICS ISSUE ABEND
    [ABCODE(abend-code)]
    [RESP(response-code)]
END-EXEC

Parameters

Optional Parameters

ABCODE(abend-code) - Abend code to be issued
RESP(response-code) - Response code variable

Abend Types

User-Defined Abends

Program-defined abnormal termination

• USER ABEND - User-defined abend codes
• CUSTOM TERMINATION - Custom termination logic
• CONTROLLED ABEND - Controlled abnormal termination
• PROGRAM ABEND - Program-initiated abend

System Abends

System-generated abnormal termination

• SYSTEM ABEND - System-generated abend codes
• ERROR ABEND - Error-based abend
• EXCEPTION ABEND - Exception-based abend
• FAILURE ABEND - Failure-based abend

Conditional Abends

Condition-based abnormal termination

• CONDITION ABEND - Condition-based abend
• VALIDATION ABEND - Validation failure abend
• BUSINESS ABEND - Business logic abend
• DATA ABEND - Data error abend

Emergency Abends

Emergency abnormal termination

• EMERGENCY ABEND - Emergency termination
• CRITICAL ABEND - Critical error abend
• FATAL ABEND - Fatal error abend
• IMMEDIATE ABEND - Immediate termination

Programming Examples

Basic Abnormal Termination

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ABEND01.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ABEND-CODE      PIC X(4) VALUE 'U001'.
       01  RESPONSE-CODE   PIC S9(8) COMP.
       01  ERROR-CONDITION PIC X(1) VALUE 'Y'.
       
       PROCEDURE DIVISION.
           IF ERROR-CONDITION = 'Y'
               DISPLAY 'Error condition detected - issuing abend'
               
               EXEC CICS ISSUE ABEND
                   ABCODE(ABEND-CODE)
                   RESP(RESPONSE-CODE)
               END-EXEC
               
               DISPLAY 'Abend issued with code: ' ABEND-CODE
           ELSE
               DISPLAY 'Normal processing continues'
           END-IF
           
           EXEC CICS RETURN END-EXEC.

Advanced Abend Control

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ABEND02.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ABEND-CODE      PIC X(4) VALUE 'U002'.
       01  RESPONSE-CODE   PIC S9(8) COMP.
       01  ERROR-TYPE      PIC X(1).
       01  RETRY-COUNT     PIC S9(2) COMP VALUE 0.
       01  MAX-RETRIES     PIC S9(2) COMP VALUE 3.
       
       PROCEDURE DIVISION.
           PERFORM PROCESS-WITH-RETRY
           
           EXEC CICS RETURN END-EXEC.
       
       PROCESS-WITH-RETRY.
           PERFORM PROCESS-LOGIC
           
           IF ERROR-TYPE = 'F'
               DISPLAY 'Fatal error - issuing abend'
               EXEC CICS ISSUE ABEND
                   ABCODE(ABEND-CODE)
                   RESP(RESPONSE-CODE)
               END-EXEC
           ELSE IF ERROR-TYPE = 'R' AND RETRY-COUNT < MAX-RETRIES
               ADD 1 TO RETRY-COUNT
               DISPLAY 'Retryable error - retrying'
               PERFORM PROCESS-WITH-RETRY
           ELSE
               DISPLAY 'Processing completed successfully'
           END-IF.
       
       PROCESS-LOGIC.
           *> Add your processing logic here
           MOVE 'N' TO ERROR-TYPE.

Error Handling with Abend Control

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       IDENTIFICATION DIVISION.
       PROGRAM-ID. ABEND03.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  ABEND-CODE      PIC X(4) VALUE 'U003'.
       01  RESPONSE-CODE   PIC S9(8) COMP.
       01  ERROR-SEVERITY  PIC X(1).
       01  ERROR-MESSAGE   PIC X(50).
       
       PROCEDURE DIVISION.
           PERFORM VALIDATE-INPUT
           
           IF ERROR-SEVERITY = 'H'
               DISPLAY 'High severity error - issuing abend'
               MOVE 'High severity error detected' TO ERROR-MESSAGE
               
               EXEC CICS ISSUE ABEND
                   ABCODE(ABEND-CODE)
                   RESP(RESPONSE-CODE)
               END-EXEC
           ELSE IF ERROR-SEVERITY = 'M'
               DISPLAY 'Medium severity error - logging and continuing'
               MOVE 'Medium severity error logged' TO ERROR-MESSAGE
           ELSE
               DISPLAY 'Low severity error - continuing processing'
               MOVE 'Low severity error handled' TO ERROR-MESSAGE
           END-IF
           
           EXEC CICS RETURN END-EXEC.
       
       VALIDATE-INPUT.
           *> Add validation logic here
           MOVE 'L' TO ERROR-SEVERITY.

Abend Management

Abend Control

• Abend Initiation - Initiate abnormal termination
• Abend Management - Manage abend conditions
• Abend Monitoring - Monitor abend occurrences
• Abend Recovery - Recover from abends

Error Handling

• Error Detection - Detect error conditions
• Error Classification - Classify error severity
• Error Response - Respond to errors appropriately
• Error Recovery - Recover from errors

Termination Management

• Termination Control - Control termination process
• Termination Cleanup - Clean up before termination
• Termination Logging - Log termination events
• Termination Recovery - Recover from termination

System Impact

• System Stability - Maintain system stability
• Resource Cleanup - Clean up system resources
• Transaction Integrity - Maintain transaction integrity
• System Recovery - Recover system state

Error Handling

Common Response Codes

DFHRESP(NORMAL) - Abend issued successfully
DFHRESP(INVREQ) - Invalid abend request
DFHRESP(NOTAUTH) - Not authorized to issue abend
DFHRESP(ABENDERR) - Abend-specific error
DFHRESP(SYSTEMERR) - System error occurred
DFHRESP(RESOURCEERR) - Resource error occurred

Performance Considerations

Abend Efficiency

• Use abends judiciously - Only issue abends when necessary
• Minimize abend overhead - Reduce the impact of abends
• Use appropriate abend codes - Use meaningful abend codes
• Monitor abend frequency - Track abend occurrences

System Impact

• Monitor system impact - Track how abends affect the system
• Optimize abend handling - Ensure efficient abend handling
• Manage resource cleanup - Properly clean up resources after abends
• Track system stability - Monitor overall system stability

Best Practices

Abend Control Best Practices

• Use abends only for serious error conditions
• Use meaningful abend codes
• Implement proper error handling
• Ensure proper cleanup before abend
• Log abend information for debugging
• Monitor abend frequency and patterns
• Use abends as a last resort

Explain It Like I'm 5 Years Old

Think of CICS ISSUE ABEND like stopping a game when something goes wrong:

• Something Wrong: "Something bad happened in the game" - Error detected
• Stop Game: "Stop the game right now" - Issue abend
• Tell Everyone: "Tell everyone why you stopped" - Abend code
• Clean Up: "Put everything away" - Cleanup resources
• Start Over: "Start a new game" - System recovery

Exercises

Exercise 1: Basic Abend Control

Create a program that issues an abend when a specific error condition is detected.

Exercise 2: Conditional Abend Logic

Write a program that uses different abend codes based on error severity.

Exercise 3: Error Handling

Implement comprehensive error handling with abend control and recovery procedures.

CICS ISSUE ABEND - Abnormal Termination Control

What is CICS ISSUE ABEND?

Command Syntax

Parameters

Optional Parameters

Abend Types

User-Defined Abends

System Abends

Conditional Abends

Emergency Abends

Programming Examples

Basic Abnormal Termination

Advanced Abend Control

Error Handling with Abend Control

Abend Management

Abend Control

Error Handling

Termination Management

System Impact

Error Handling

Common Response Codes

Performance Considerations

Abend Efficiency

System Impact

Best Practices

Abend Control Best Practices

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Basic Abend Control

Exercise 2: Conditional Abend Logic

Exercise 3: Error Handling

Related Concepts

Error Handling

Abend Management

Transaction Management

System Recovery

Debugging

Related Pages