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Table of Contents

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  1. Preface
  2. Understanding Pipeline Partitioning
  3. Partition Points
  4. Partition Types
  5. Pushdown Optimization
  6. Pushdown Optimization and Transformations
  7. Real-time Processing
  8. Commit Points
  9. Row Error Logging
  10. Workflow Recovery
  11. Stopping and Aborting
  12. Concurrent Workflows
  13. Grid Processing
  14. Load Balancer
  15. Workflow Variables
  16. Parameters and Variables in Sessions
  17. Parameter Files
  18. FastExport
  19. External Loading
  20. FTP
  21. Session Caches
  22. Incremental Aggregation
  23. Session Log Interface
  24. Understanding Buffer Memory
  25. High Precision Data

Advanced Workflow Guide

Advanced Workflow Guide

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Message Recovery

Message Recovery

When you recover a real-time session, the Integration Service reads and processes the cached messages. After the Integration Service reads all cached messages, it ends the session.
For sessions with JMS and WebSphere MQ sources, the Integration Service uses the message ID in the recovery file to retrieve the message from the source.
The Integration Service clears the recovery file after the flush latency period expires and at the end of a successful session. If the session fails after the Integration Service commits messages to the target but before it removes the messages from the recovery file, targets can receive duplicate rows during recovery.