CEAttributes for new types are ignored until the eventing controller gets restarted

[antoineco]

Describe the bug

My cluster contains a custom object that exposes the following ceAttributes:

  status:
    ceAttributes:
    - source: eu-central-1:table/sample-table
      type: com.amazon.dynamodb.com.amazon.dynamodb.insert
    - source: eu-central-1:table/sample-table
      type: com.amazon.dynamodb.com.amazon.dynamodb.modify
    - source: eu-central-1:table/sample-table
      type: com.amazon.dynamodb.com.amazon.dynamodb.remove

The custom resource for that object was registered (its CRD was created) while the eventing controller was up.

After registering the custom resource and creating an instance of that resource (the custom object), the eventing controller did not create the corresponding EventTypes:

$ kubectl get eventtypes.eventing.knative.dev
No resources found in default namespace.

But it did after a user-initiated restart:

$ kubectl -n knative-eventing delete pod eventing-controller-64bb96c78d-8lx7x
pod "eventing-controller-64bb96c78d-8lx7x" deleted

$ kubectl get eventtypes.eventing.knative.dev
NAME                               TYPE                         SOURCE                            SCHEMA   BROKER    DESCRIPTION   READY   REASON
1b6034f38200a7c449c2171246b0de21   com.amazon.dynamodb.modify   eu-central-1:table/sample-table            default                 True
9357f37c9cecc7f6440abbbee65ffb64   com.amazon.dynamodb.remove   eu-central-1:table/sample-table            default                 True
e1092d97ce9984b0e13fbce49ab6d132   com.amazon.dynamodb.insert   eu-central-1:table/sample-table            default                 True

Expected behavior

The eventing controller can dynamically handle the addition of new ducks (a Source in this case).

To Reproduce

1. Deploy eventing core
   1 Deploy a custom source such as GitHubSource
2. Confirm that the corresponding eventtypes were not created
3. Restart the eventing controller inside the knative-eventing namespace
4. Confirm that the corresponding eventtypes were created

Knative release version

master @ 955aa36

Additional context

Related to #2770

[github-actions]

This issue is stale because it has been open for 90 days with no
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inactivity. Reopen the issue with /reopen. Mark the issue as
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[antoineco]

/remove-lifecycle stale

[github-actions]

This issue is stale because it has been open for 90 days with no
activity. It will automatically close after 30 more days of
inactivity. Reopen the issue with /reopen. Mark the issue as
fresh by adding the comment /remove-lifecycle stale.