findingrish opened a new pull request, #16779:
URL: https://github.com/apache/druid/pull/16779
Add a new revised IT group `BackwardIncompatibility`. The idea is to catch
potential backward incompatibility issues that may arise during rolling
upgrade.
This test group runs a docker-compose cluster with Overlord & Coordinator
service on the previous druid version.
Following env vars have been added in the GHA file
`.github/workflows/unit-and-integration-tests-unified.yml`
```
BACKWARD_INCOMPATIBILITY_IT_ENABLED -> To enable the IT.
DRUID_PREVIOUS_VERSION -> Previous druid version to test backward
incompatibility.
DRUID_PREVIOUS_VERSION_DOWNLOAD_URL -> URL to fetch the tar.
DRUID_PREVIOUS_IT_IMAGE_NAME -> Name of the image built using the previous
version tar.
```
This PR has:
- [ ] been self-reviewed.
- [ ] using the [concurrency
checklist](https://github.com/apache/druid/blob/master/dev/code-review/concurrency.md)
(Remove this item if the PR doesn't have any relation to concurrency.)
- [ ] added documentation for new or modified features or behaviors.
- [ ] a release note entry in the PR description.
- [ ] added Javadocs for most classes and all non-trivial methods. Linked
related entities via Javadoc links.
- [ ] added or updated version, license, or notice information in
[licenses.yaml](https://github.com/apache/druid/blob/master/dev/license.md)
- [ ] added comments explaining the "why" and the intent of the code
wherever would not be obvious for an unfamiliar reader.
- [ ] added unit tests or modified existing tests to cover new code paths,
ensuring the threshold for [code
coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md)
is met.
- [ ] added integration tests.
- [ ] been tested in a test Druid cluster.
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