MLE-24402 Bumping to Hadoop 3.4.2

[rjrudin]

This is to match Flux, which is depending on Hadoop 3.4.2.

Also fixed all compiler warnings, so enabling those as errors now.

[github-actions]

Copyright Validation Results
Total: 3 | Passed: 1 | Failed: 0 | Skipped: 2 | at: 2025-09-24 17:27:51 UTC | commit: 4f52036

⏭️ Skipped (Excluded) Files

• build.gradle
• marklogic-spark-connector/build.gradle

✅ Valid Files

• marklogic-spark-connector/src/test/java/com/marklogic/spark/AbstractIntegrationTest.java

✅ All files have valid copyright headers!

[Copilot]

Pull Request Overview

This PR upgrades the Hadoop dependency to version 3.4.2 to match Flux's dependency version, while also enabling compiler warnings as errors to maintain code quality.

• Upgraded Hadoop dependency to version 3.4.2
• Fixed all existing compiler warnings
• Enabled treating compiler warnings as errors

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
marklogic-spark-connector/src/test/java/com/marklogic/spark/AbstractIntegrationTest.java	Added generic type parameter to DataFrameWriter to fix unchecked type warning
marklogic-spark-connector/build.gradle	Added compiler warning configuration, fixed Gradle syntax deprecations, and updated JVM args syntax

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[Copilot]

The options.warnings = true setting is redundant since warnings are already enabled by default in Gradle. The -Xlint flags on line 150 are sufficient for enabling specific warning categories.

Suggested change

options.warnings = true

[sonarqube-progress-marklogic]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube