AmatyaAvadhanula opened a new pull request, #15992:
URL: https://github.com/apache/druid/pull/15992
The segment transactional replace action facilitates concurrent replace with
streaming append by
1) Upgrading pending segments in the metadata store
2) Relaying this information to the streaming tasks so that they may update
their internal state for queries
Presently both the steps happen outside the transaction in which the
replacing segments are committed.
This PR aims to fix potential conflicts by ensuring that the pending segment
upgrade happens in the same transaction in which the segments are committed.
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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