I have a D8 migration from a SQL source to nodes which is working perfectly apart from track_changes is not working, in my YAML I simply have:

  plugin: job
    slash: /
  track_changes: true

I discovered track_changes does not work when the map is joinable and applied the patch, but every time I run the migration I get:

[notice] Processed 0 items (0 created, 0 updated, 0 failed, 0 ignored) - done with 'job'

Do I need to add anything specific to the source plugin? For now I'm getting round this by updating the whole migration each time, but I would prefer not to. If necessary I will have to use the high_water_property instead.

1 Answer 1


I had an issue like you did and i solve it by changing my:

track_changes: true


    name: changed
    alias: n

But the problem with this way that you need to:

  1. Manually delete, NOT update your database destination fields.
  2. Import old data.(Before check your source plugin, it must have changed field!)
  3. Update your database with new data.

(and only than high_water_property will work)

About this two Source Plugins

Declaring highwater property in Migrate

About track_changes

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