IBM
000-349 · Question #6
000-349 Question #6: Real Exam Question with Answer & Explanation
The correct answer is A. Enable a Map Retry.. Concurrent map executions via Command Server can cause file-locking conflicts when both append to the same audit log, and enabling a Map Retry allows recovery from these transient failures.
Question
A map has been designed to append to an audit log when a validation error occurs. The map is being run using the Command Server. At runtime, the map intermittently fails. After some investigation it is determined that the same map is being called by a RUN function in another map. Select the option that may reduce the number of map failures.
Options
- AEnable a Map Retry.
- BEnable a Card Retry on the input cards.
- CChange the Map Audit Action setting from append to create
- DModify the map settings to specify a custom file name for the audit log.
Explanation
Concurrent map executions via Command Server can cause file-locking conflicts when both append to the same audit log, and enabling a Map Retry allows recovery from these transient failures.
Common mistakes.
- B. Card Retry retries only the input card read operation and does not address the file access conflict occurring on the audit log output file.
- C. Changing the audit action from append to create would cause each run to overwrite the log and destroy prior entries, but would not resolve the concurrency conflict since both maps would still target the same file path.
- D. Specifying a custom audit log filename does not prevent concurrent access conflicts unless each map instance uses a uniquely named file, which this option does not guarantee.
Concept tested. WTX Command Server map retry for concurrent file access conflicts
Reference. https://www.ibm.com/docs/en/wtx
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