difin opened a new pull request, #6327:
URL: https://github.com/apache/hive/pull/6327
<!--
Thanks for sending a pull request! Here are some tips for you:
1. If this is your first time, please read our contributor guidelines:
https://cwiki.apache.org/confluence/display/Hive/HowToContribute
2. Ensure that you have created an issue on the Hive project JIRA:
https://issues.apache.org/jira/projects/HIVE/summary
3. Ensure you have added or run the appropriate tests for your PR:
4. If the PR is unfinished, add '[WIP]' in your PR title, e.g.,
'[WIP]HIVE-XXXXX: Your PR title ...'.
5. Be sure to keep the PR description updated to reflect all changes.
6. Please write your PR title to summarize what this PR proposes.
7. If possible, provide a concise example to reproduce the issue for a
faster review.
-->
### What changes were proposed in this pull request?
<!--
Please clarify what changes you are proposing. The purpose of this section
is to outline the changes and how this PR fixes the issue.
If possible, please consider writing useful notes for better and faster
reviews in your PR. See the examples below.
1. If you refactor some codes with changing classes, showing the class
hierarchy will help reviewers.
2. If you fix some SQL features, you can provide some references of other
DBMSes.
3. If there is design documentation, please add the link.
4. If there is a discussion in the mailing list, please add the link.
-->
The Standalone REST Catalog Server is reimplemented to use Spring Boot
instead of plain Java:
- Server framework – Uses Spring Boot with an embedded Jetty server instead
of raw servlet wiring.
- Health checks – Adds Actuator liveness and readiness probes; readiness
verifies HMS connectivity via Thrift.
- Observability – Exposes Prometheus metrics for Kubernetes HPA and
monitoring.
- Configuration – Keeps port and other settings in MetastoreConf but bridges
them into Spring (e.g., via system properties) so Spring Boot uses the
configured port.
- Graceful shutdown – Uses Spring Boot’s shutdown handling with a
configurable timeout.
Standalone packaging – Adds a spring-boot-maven-plugin “exec” JAR for
running the server as a standalone process.
### Why are the changes needed?
<!--
Please clarify why the changes are needed. For instance,
1. If you propose a new API, clarify the use case for a new API.
2. If you fix a bug, you can clarify why it is a bug.
-->
Spring Boot improves how the Standalone REST Catalog Server is run and
operated:
- Kubernetes support – Liveness and readiness probes (/actuator/health/*)
let Kubernetes reliably route traffic and restart unhealthy pods. Readiness
includes an actual HMS connectivity check instead of a simple config check.
- Observability – Prometheus metrics enable HPA, dashboards, and alerting,
which is standard for production deployments.
- Operational behavior – Graceful shutdown and a well-defined lifecycle
reduce the chance of dropped requests during restarts.
- Maintainability – Spring Boot replaces custom servlet wiring and
configuration, and aligns with common patterns for cloud-native Java services.
### Does this PR introduce _any_ user-facing change?
<!--
Note that it means *any* user-facing change including all aspects such as
the documentation fix.
If yes, please clarify the previous behavior and the change this PR proposes
- provide the console output, description, screenshot and/or a reproducable
example to show the behavior difference if possible.
If possible, please also clarify if this is a user-facing change compared to
the released Hive versions or within the unreleased branches such as master.
If no, write 'No'.
-->
If the standalone REST Catalog server is deployed in Kubernetes:
- Liveness/readiness probes – Configure HTTP probes to use the new actuator
endpoints:
-- Liveness: httpGet: /actuator/health/liveness
-- Readiness: httpGet: /actuator/health/readiness
- Metrics/HPA – Prometheus scraping or custom metrics use
/actuator/prometheus.
### How was this patch tested?
<!--
If tests were added, say they were added here. Please make sure to add some
test cases that check the changes thoroughly including negative and positive
cases if possible.
If it was tested in a way different from regular unit tests, please clarify
how you tested step by step, ideally copy and paste-able, so that other
reviewers can test and check, and descendants can verify in the future.
If tests were not added, please describe why they were not added and/or why
it was difficult to add.
-->
Integration tests in `TestStandaloneRESTCatalogServer` where updated to run
the Spring Boot standalone HMS rest catalog server, verify liveness and
readiness probes, Prometheus metrics.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
