The documentation does not seem to document the minimum JDK runtime requirement for `org.elasticsearch.plugin:x-pack-sql-jdbc`

[linghengqian]

• In order to avoid https://discuss.elastic.co/t/the-documentation-does-not-seem-to-document-the-minimum-jdk-runtime-requirement-for-org-elasticsearch-plugin-x-pack-sql-jdbc/372078?u=linghengqian being locked due to no reply, I opened the current issue.
• The documentation does not seem to document the minimum JDK runtime requirement for org.elasticsearch.plugin:x-pack-sql-jdbc.
• I am of course aware that using the JDBC driver requires a trial or paid license for the Elasticsearch cluster, and that the JDBC driver org.elasticsearch.plugin:x-pack-sql-jdbc itself is not an OSS license. I mainly want to test the PR [FLINK-30702] Add Elasticsearch dialect apache/flink-connector-jdbc#136 on the Flink side locally.
• But https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-jdbc.html does not seem to record the minimum JDK version requirement for org.elasticsearch.plugin:x-pack-sql-jdbc.
• I want to know whether the minimum JDK version requirement for org.elasticsearch.plugin:x-pack-sql-jdbc is JDK 8, or JDK23 consistent with Elasticsearch Server? I'm referring to Update bundled jdk to 23 #114823 .

[elasticsearchmachine]

Pinging @elastic/es-docs (Team:Docs)

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)

[leemthompo]

@rjernst any insight here?

[rjernst]

The minimum version for the jdbc sql artifact should be JDK 8:

from its build.gradle:

tasks.named("compileJava").configure {
  targetCompatibility = JavaVersion.VERSION_1_8
  sourceCompatibility = JavaVersion.VERSION_1_8
}

However, it looks like something is messing that up, the resulting manifest shows it was compiled for JDK 21:

❯ unzip -p build/distributions/x-pack-sql-jdbc-9.0.0-SNAPSHOT.jar META-INF/MANIFEST.MF
Manifest-Version: 1.0
Module-Origin: git@github.com:rjernst/elasticsearch.git
Change: 874bf7ba1e29997a8dd1475aa23624fcbcfd9f55
X-Compile-Elasticsearch-Version: 9.0.0-SNAPSHOT
X-Compile-Lucene-Version: 10.0.0
X-Compile-Elasticsearch-Snapshot: true
Implementation-Title: org.elasticsearch.plugin#jdbc;9.0.0-SNAPSHOT
Implementation-Version: 9.0.0-SNAPSHOT
Built-Status: integration
Built-By: rjernst
Built-OS: Mac OS X
Build-Timezone: America/Los_Angeles
Build-Date-UTC: 2025-01-16T17:02:04.036851Z
Build-Date: 2025-01-16T17:01:47.573756Z
Gradle-Version: 8.12
Created-By: 23 (Homebrew)
X-Compile-Target-JDK: 21
X-Compile-Source-JDK: 21
Build-Java-Version: 23