Default CI Java Version to Java 11, run tests on 8, 11, 14 (and attempt 17)

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In the documentation we say:

We recommend Java 11 (LTS), but OpenSearch also works with Java 8.

OpenSearch 1.0, 1.1 and 1.2 have used Java 14, which is not an LTS release. Because of this:

1. OpenSearch has lowered the JDK to 11 in Lower build requirement from Java 14+ to Java 11+ OpenSearch#940 and version 1.3.0 will package JDK 11 as a runtime via Downgrade to JDK 11. OpenSearch#2301.
2. The build/distribution pipeline has lowered the JDK to 11 for 1.3.0 in Lower Java version to 11 for OpenSearch 1.3.0. opensearch-build#981.

Plugins need to do the same for 1.3.0.

• Change the default Java version for CI in GitHub actions from 14/15 to 11 (LTS) and ensure 🟢 .
• Try adding Java 8, 14 (used before), and 17 (next LTS) to the CI matrix.
  Open issues for any that don't work.
  e.g. Run CI/CD on Java 8, 11, 14 and 17. common-utils#121
  e.g. Run CI on JDK 8, 11, and 14. job-scheduler#130
• Document Java versions in DEVELOPER_GUIDE.md for your project (copy/subset of OpenSearch).

Looking at 1.3.0:

• bundled JDK = 11
• build JDK = 11
• min JDK = 8

Originally 1.3.0 was supposed to GA with JDK 17, but we ran into a number of issues:

• [BUG] Security plugin transport layer(multi-node cluster) does not work due to missing required reflective access (JDK17) security#1653
• [BUG] Build tools targets JDK 10+ making it impossible for plugins to test on supported JDK8 OpenSearch#2298
• [BUG] de.thetaphi.forbiddenapis.gradle.ForbiddenApisPlugin fails to initialize on JDK17 OpenSearch#2299
• [BUG] PA plugin does not work due to missing required access performance-analyzer#144

For 2.0 we will remove support for Java 8, fix the above issues, upgrade to Gradle 7, and bundle JDK 17, which is #110.

OpenSearch

• Pickup Java version from .properties in OpenSearch gradle check OpenSearch#2395
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 common-utils#100
  Run CI/CD on Java 8, 11, 14 and 17. common-utils#121

Plugins

• Default CI Java Version to Java 11, run tests on 8, 14 and 17 cross-cluster-replication#254
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 alerting#242
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 anomaly-detection#320
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 asynchronous-search#66
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 reporting#230
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 index-management#200
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 job-scheduler#103
  Run CI on JDK 8, 11, and 14. job-scheduler#130
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 k-NN#220
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 performance-analyzer#91
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 security-dashboards-plugin#862
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 security#1502
• Default CI Java Version to Java 11, run tests on 8, 14 (and 17) sql#288
• Default CI Java Version to Java 11, run tests on 8, 14 and 17 observability#260

Related

• Lower CI Java Version to Java 11  opensearch-build#74