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

Unrecoverable Workflows or Tasks

Unrecoverable Workflows or Tasks

In some cases, the Integration Service cannot recover a workflow or task. You cannot recover a workflow or task under the following circumstances:
  • You change the number of partitions.
    If you change the number of partitions after a session fails, the recovery session fails.
  • The interrupted task has a fail recovery strategy.
    If you configure a Command or Session recovery to fail and continue the workflow recovery, the task is not recoverable.
  • Recovery storage file is missing.
    The Integration Service fails the recovery session or workflow if the recovery storage file is missing from $PMStorageDir or if the definition of $PMStorageDir changes between the original and recovery run.
  • Recovery table is empty or missing from the target database.
    The Integration Service fails a recovery session under the following circumstances:
    • You deleted the table after the Integration Service created it.
    • The session enabled for recovery failed immediately after the Integration Service removed the recovery information from the table.
You might get inconsistent data if you perform recovery under the following circumstances:
  • The sources or targets change after the initial session.
    If you drop or create indexes or edit data in the source or target tables before recovering a session, the Integration Service may return missing or repeat rows.
  • The source or target code pages change after the initial session failure.
    If you change the source or target code page, the Integration Service might return incorrect data. You can perform recovery if the code pages are two-way compatible with the original code pages.


Updated June 03, 2019