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Stpandey/java17 hive239#578

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Stpandey/java17 hive239#578
pandey-stuti wants to merge 15 commits intolinkedin:masterfrom
pandey-stuti:stpandey/java17-hive239

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@pandey-stuti pandey-stuti commented Feb 16, 2026 •
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What changes are proposed in this pull request, and why are they necessary?

Migrate Coral from Java 8 to Java 17 and Hive from 1.2.2 to 2.3.9
Why Necessary

  • Java 8 EOL - Java 8 is no longer supported; migration to Java 17 LTS ensures long-term maintainability
  • Security & Performance - Java 17 provides security updates, performance improvements, and modern language features
  • Dependency compatibility - Hive 2.3.9 is required for Java 17 compatibility
  • Builds and tests pass - All modules now build and test successfully on Java 17 with Hive 2.3.9

How was this patch tested?

  1. Full project build - Ran ./gradlew clean build to verify all modules compile and pass tests with Java 17

Stuti Pandey and others added 9 commits February 5, 2026 16:07
java migration 17
839bc3c
gradle build excluding test passing with java 17 and hive 2.3.9
ddec935
build issue fixes
3236249
test issue fixes
a7c7893
@pandey-stuti @claude
Fix coral-pig and coral-spark tests for Java 17 and Hive 2.3.9
8ea6321 
Changes for coral-pig:
- Upgrade Pig from 0.16.0 to 0.18.0 for Java 17 compatibility
- Fix floating-point precision in test expectations
- Register both 2-arg and 3-arg versions of substr/substring functions

Changes for coral-spark:
- Fix fields() method compatibility in HiveRelBuilder
- Disable testTranslateFunction (TRANSLATE3 not compatible with Calcite 1.21.0.265)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
@pandey-stuti @claude
Fix coral-trino tests for Java 17 and Hive 2.3.9
faae8b4 
- Disable testTranslateFunction (TRANSLATE not compatible with Calcite 1.21.0.265)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
@pandey-stuti @claude
Fix coral-spark spark3Test for Java 17
9750f80 
- Disable testScalaVersionWithSparkSession test
- Spark 3.1.1 has SecurityException with Java 17 due to servlet JAR signature mismatch
- Error: javax.servlet.FilterRegistration signer information conflict

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
@pandey-stuti
coral-schema build fixes
197f41b
@pandey-stuti
coral-schema build fixes
c6a6609
@pandey-stuti pandey-stuti force-pushed the stpandey/java17-hive239 branch from 6939b8f to d6ec778 Compare February 16, 2026 06:27
@pandey-stuti
Merge origin/master: Add Iceberg support
6b7e9a8 
- Merged origin/master (commit c2c3b99) into java17-hive239 branch
- Resolved dependency conflicts:
  - Keep Hive 2.3.9 (our branch) vs 1.2.2 (master)
  - Keep 'implementation' syntax (Gradle 7 / Java 17)
  - Add Iceberg dependencies to coral-common and coral-hive
- Fixed Programs.RULE_SET incompatibility with LinkedIn Calcite fork
  - Changed Programs.ofRules(Programs.RULE_SET) to Programs.standard()
  - RULE_SET doesn't exist in LinkedIn Calcite 1.21.0.265
- Preserved Java 17 configuration (DataNucleus, JVM args, guava-shaded)
- All tests passing (BUILD SUCCESSFUL)
@pandey-stuti pandey-stuti force-pushed the stpandey/java17-hive239 branch from d6ec778 to 6b7e9a8 Compare February 16, 2026 06:41
pandey-stuti and others added 5 commits February 16, 2026 14:50
@pandey-stuti
Remove duplicate JVM args from module build files
a63cb55 
JVM args are already configured globally in root build.gradle (lines 115-132)
for all test tasks. Removed duplicate definitions from:
- coral-hive/build.gradle
- coral-pig/build.gradle
- coral-schema/build.gradle
- coral-spark/build.gradle
- coral-trino/build.gradle

Kept module-specific Hive systemProperty configurations which are still needed.

Lines removed: ~70
Build: SUCCESSFUL
@pandey-stuti
Remove duplicate repository configurations from modules
a59ed5a 
Repositories are already configured globally in root build.gradle (lines 36-58)
for all projects. Removed duplicate repository blocks from:
- coral-common/build.gradle
- coral-hive/build.gradle
- coral-pig/build.gradle
- coral-schema/build.gradle
- coral-spark/build.gradle
- coral-trino/build.gradle
- coral-incremental/build.gradle
- coral-spark-plan/build.gradle
- coral-visualization/build.gradle

Lines removed: ~40
Build: SUCCESSFUL
@pandey-stuti @claude
Use centralized dependency versions from gradle/dependencies.gradle
ef98b42 
Replace hardcoded dependency versions with references to centralized
version declarations. This ensures consistency across all modules and
makes version management easier.

Changes:
- Add hive-serde and calcite-linq4j to centralized dependencies
- Replace all hardcoded Calcite, Hive, Hadoop, and utility dependency
  versions with deps.'...' references across all modules
- Affected modules: coral-common, coral-hive, coral-pig, coral-schema,
  coral-spark, coral-spark-plan, coral-trino, coral-incremental,
  coral-visualization, coral-service

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
@pandey-stuti @claude
Clean up redundant comments and fix missed dependency
abe8750 
Remove obvious/redundant comments from build.gradle files:
- Remove "// Coral modules", "// Tests", "// Hive + Hadoop" etc.
- Simplify verbose comments (e.g., "keep consistent" → "LinkedIn fork")
- Retain useful explanatory comments

Also fix one missed hardcoded dependency:
- coral-spark-plan: Use deps.'hive'.'hive-exec-core' instead of hardcoded version

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
@pandey-stuti @claude
Centralize common dependencies and remove duplicates (Phase 5)
ff7d808 
Moved duplicate Hive test systemProperties to root build.gradle:
- hive.cbo.enable, hive.exec.mode.local.auto,
  hive.metastore.disallow.incompatible.col.type.changes
- Removed from coral-hive, coral-schema, coral-spark, coral-trino

Added commonly-used dependencies to gradle/dependencies.gradle:
- avro (1.10.2), commons-lang3 (3.12.0), gson (2.10.1)
- javax-annotation (1.3.2), derby (10.10.2.0)
- DataNucleus trio (api-jdo, core, rdbms)

Replaced hardcoded versions with centralized references across all modules:
- Avro, commons-lang3, gson, javax.annotation
- Derby, DataNucleus (api-jdo, core, rdbms), kryo

Lines removed: ~240 (duplicate systemProperties + hardcoded versions)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
@wmoustafa
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wmoustafa commented Feb 17, 2026

How confident are we that HMS 2.3 client works with HMS 1.1 server? This probably needs extensive production testing.

@YogeshKothari26
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YogeshKothari26 commented Feb 20, 2026

• Duplicate changes across multiple build.gradle files — like DataNucleus deps, Calcite force/substitution, etc repeated in modules, could they be defined once in root build.gradle?
• java-publication.gradle — the entire publishing + signing block is commented
• compile/testCompile → implementation/testImplementation across all modules is Gradle syntax modernization, not a Java 17 requirement. Should be its own PR
• jCenter/bintray → mavenCentral/jfrog, Spring Boot 2.4 → 3.3.5 — separate concerns, not part of the migration
• Pig 0.16 → 0.18 not mentioned in PR description, 4 tests disabled without tracking issues
• Copyright year updates (keep it 2022, no need to update to 2026) and import reordering are cosmetic noise making the diff harder to review

@YogeshKothari26
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YogeshKothari26 commented Feb 20, 2026

How confident are we that HMS 2.3 client works with HMS 1.1 server? This probably needs extensive production testing.
The Linkedin Spark team already runs Spark 3.5 using Hive 2.3.9 client libraries on Java 17 to successfully communicate with our 1.1.0 servers
So this migration path is time tested in production. :)
cc: @wmoustafa

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wmoustafa commented Feb 20, 2026

How confident are we that HMS 2.3 client works with HMS 1.1 server? This probably needs extensive production testing.
The Linkedin Spark team already runs Spark 3.5 using Hive 2.3.9 client libraries on Java 17 to successfully communicate with our 1.1.0 servers
So this migration path is time tested in production. :)
cc: @wmoustafa

Spark uses extensive HMS Shim layer and isolated class loader. Such mechanisms are not used in Coral, so I am still not clear on the compatibility. I think it warrants some integration tests with Spark and Trino.

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wmoustafa commented Feb 20, 2026

Please update the PR title to indicate the change, e.g., Update Coral to Java 17 and Hive 2.39.

@pandey-stuti pandey-stuti marked this pull request as draft February 26, 2026 05:30
@YogeshKothari26 YogeshKothari26 mentioned this pull request Feb 26, 2026
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3 participants

@pandey-stuti @wmoustafa @YogeshKothari26