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Status Not under consideration
Workspace Data Lineage by Manta
Created by Guest
Created on Jul 24, 2025

RELATED IDEAS

Filter out old entries from log viewer when the workflow executions are missing in process manager in Manta

Background: The process manager in Manta sometimes goes through data corruption and reverts back to an earlier state.

Let's illustrate with an example:

Let's say I have a manta instnaces where I have execeuted a few workflows. I have workflow execution IDs 1,2,3,4.

The process manager database was corrupted, and so after it was cleaned up, the workflow IDs for 3 and 4 may be lost, The Process manager will show execution IDs 1 and 2. This is current behavior and expected.

If I run some workflows, the new executions will will reuse the execution IDs 3,4

If I now use the Manta log viewer to view or download the logs for workflow ID 3 or 4, the downloaded logs and UI includes log entries from the previous runs of 3,4.

This results in providing log messages that are misleading.

As a solution, consider one of these:

1. Internally maintain a different unique workflowID to correlate workflow execution with logs, not a numeric one. Consider UUIDs

2. When downloading logs, ignore messages that fall outside of the execution window of the workflow itself.

3. Delete logs for the log database if the corresponding workflow execution has been lost from the process manager

Impacted audient: Manta customers, because they find it harder to debug workflows. and IBM support engineers, because they are sent the wrong log files.

Needed By Quarter
  • Admin
    Jakub Moravec
    Sep 28, 2025

    Hi Devayon,

    If a Process Manager database is manually cleaned up because of a corruption, it is advisable to clean the Log Viewer database as well. (The same doesn't apply vice-versa, as Process Manager database contains definitions of Workflows and it's typically not desirable to clean those.) I'm requesting this note to be added to the relevant documentation (https://www.ibm.com/docs/en/manta-data-lineage?topic=articles-restoring-corrupted-h2-database).

    More sophisticated solution including corellation IDs are in place on Unified Lineage.

    Best Regards,
    Jakub


    Reply

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