Siman-hub opened a new pull request, #13679:
URL: https://github.com/apache/skywalking/pull/13679
### Evaluation Purpose
This PR evaluates upgrading the Groovy engine from **4.0.x to 5.0.0
(earliest GA)** with a focus on validating **SkyWalking’s JDK 11 runtime
compatibility guarantee**.
Groovy is used as a runtime dependency in several OAP backend modules, so
this change is evaluated strictly from a **compatibility and policy**
perspective.
### Verification Results
Local evaluation was performed using **JDK 21 for build** and **JDK 11 for
runtime**, targeting the primary Groovy consumers (`log-analyzer` and
`meter-analyzer`).
- **Build Status:** SUCCESS (built with JDK 21)
- **Runtime Compatibility:**
Verified that the **OAP distribution starts successfully on JDK 11** with
Groovy 5.0.0.
- *Test:* Built full distribution (`-Pdist`) on JDK 21, then launched OAP
via `oapService.bat` using JDK 11.
- *Result:* Server started successfully and bound ports without any
`UnsupportedClassVersionError` or JVM compatibility failures.
- **Tests Passed:**
- `oap-server/analyzer/log-analyzer` (LAL script parsing)
- `oap-server/analyzer/meter-analyzer` (MAL script execution)
### Key Findings
- No compilation issues observed in backend modules.
- No Groovy/Spock incompatibilities detected in the existing test suite.
- Groovy 5.0.0 does not introduce runtime incompatibilities with JDK 11
based on the evaluated scope.
### Scope Notes
This PR is intended solely as a **compatibility evaluation** and does not
include test refactors, additional Groovy 5.x upgrades, or behavioral changes.
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