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Upgrade Jackson dependencies from 2.16.0 to 2.19.1. #1331

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Merged
MykolaGolubyev merged 2 commits into from
Jul 14, 2025
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Upgrade Jackson dependencies from 2.16.0 to 2.19.1. #1331

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f2b06e5
Upgrade Jackson dependencies from 2.16.0 to 2.19.1.
motlin Jul 14, 2025
02326a8
Upgrade maven-shade-plugin from 3.4.1 to 3.6.0.
motlin Jul 14, 2025
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2 changes: 1 addition & 1 deletion pom.xml
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Expand Up @@ -135,7 +135,7 @@
<vertx.io.version>3.9.4</vertx.io.version>
<commonmark.version>0.23.0</commonmark.version>
<antlr.version>4.5</antlr.version>
<jackson.version>2.16.0</jackson.version>
<jackson.version>2.19.1</jackson.version>
<webtau.version>2.2</webtau.version>
<jaxb.version>2.3.0</jaxb.version>
<ant.version>1.10.11</ant.version>
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2 changes: 1 addition & 1 deletion znai-shaded/pom.xml
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Expand Up @@ -58,7 +58,7 @@
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.4.1</version>
<version>3.6.0</version>
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@motlin motlin Jul 14, 2025

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When I upgraded jackson without upgrading the shade plugin I ran into Unsupported class file major version 65. The LLM figured it out:

  1. Jackson 2.19.1 includes Java 21 optimizations: The jackson-core-2.19.1.jar is a Multi-Release JAR (MR-JAR) that contains Java 21-specific class files in META-INF/versions/21/. The error specifically mentions the class FastDoubleSwar.class which is a performance optimization for Java 21.

  2. Class file version mismatch: The error "Unsupported class file major version 65" indicates that these are Java 21 bytecode files (major version 65 = Java 21), but the Java version running your Maven build process is older and cannot process Java 21 class files.

  3. Maven Shade Plugin limitation: The maven-shade-plugin version 3.4.1 attempts to process all class files in the JAR, including those in the multi-release sections, but fails when it encounters class files compiled for a newer Java version than what's running the build.

<executions>
<execution>
<id>shade-deps</id>
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