[dist] Add Flink 2.3 distribution and make it the default#856
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[dist] Add Flink 2.3 distribution and make it the default#856GreatEugenius wants to merge 1 commit into
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Add Flink 2.3 support and bump the default Flink version to 2.3.0. Central
2.3.0 jars are Java 11 bytecode, so the default still builds on JDK 11 — no
Java 17 requirement. dist modules follow a symmetric rule: the default
version (2.3) is bare and inherits the root flink.version; every other
version pins its own version + provided deps.
- dist: new flink-2.3 module; flink-2.2 now pins 2.2.1 + deps; root default 2.2.1 -> 2.3.0
- e2e: flink-2.3 default + flink-2.2 profile; e2e.sh default -> 2.3
- ci: add {flink 2.3, java 17} to it-java and it-python matrices
- python: bundle 2.3 thin jar into wheel manifest + build-backend test
- misc: ut.sh help, update_flink_version, faq/long_term_memory version notes
Verified: full build on JDK 11, all 5 dist versions (1.20/2.0/2.1/2.2/2.3) pass.
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Hi, @wenjin272. Could you please review this PR? Thank you! |
weiqingy
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Jun 30, 2026
| - **For Java users on JDK < 21**: Async execution is not available and falls back to synchronous execution. | ||
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| > **Cross-language async note**: Async execution for cross-language resources requires the pemja 0.5.7 fix, available in Flink 1.20.5+ / 2.0.2+ / 2.1.3+ / 2.2.1+. Current builds target Flink 2.2.0, so cross-language calls still run synchronously for now; this is resolved automatically once running on a Flink version that includes the fix. | ||
| > **Cross-language async note**: Async execution for cross-language resources requires the pemja 0.5.7 fix, available in Flink 1.20.5+ / 2.0.2+ / 2.1.3+ / 2.2.1+ / 2.3+. Current builds target Flink 2.2.1, which includes the fix, so cross-language async is enabled by default; on older Flink versions it falls back to synchronous execution automatically. |
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This line still reads Current builds target Flink 2.2.1, but the root flink.version now defaults to 2.3.0 (pom.xml:44) — looks like the version number didn't follow the default bump. Should it be 2.3.0? The rest of the sentence (the fix is present, so async is on by default) holds either way.
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Linked issue: #833
Purpose of change
Add Flink 2.3 support and bump the default Flink version to 2.3.0.
Central 2.3.0 jars are Java 11 bytecode, so the default still builds on JDK 11 — no Java 17 requirement. dist modules follow a symmetric rule: the default version (2.3) is bare and inherits the root flink.version; every other version pins its own version + provided deps.
Tests
Full build on JDK 11 — all 5 dist versions (1.20 / 2.0 / 2.1 / 2.2 / 2.3) pass. Java and Python IT cover Flink 2.3 in CI.
API
No public API changes. 2.3 is a packaging/runtime target only.
Documentation
doc-neededdoc-not-neededdoc-included