Gradle plugin crashes with Jackson-related stacktrace

[Hes-Siemelink]

I am trying the gradle plugin but it doesn't work out of the box

Setup

• Building plugin from main / 3.1.2-SNAPSHOT
• Gradle 7.5.1
• Added plugin to gradle project using

plugins {
  id("io.smallrye.openapi") version "3.1.2-SNAPSHOT"
}

generateOpenApiSpec {
  scanPackages = ["com.myproject"]
}

• Build using gradle clean build --stacktrace

Behavior

In stead of succeeding, the build fails with the following stack trace (snippet):

Caused by: java.lang.NoSuchMethodError: 'com.fasterxml.jackson.core.io.ContentReference com.fasterxml.jackson.dataformat.yaml.YAMLFactory._createContentReference(java.lang.Object)'
        at com.fasterxml.jackson.dataformat.yaml.YAMLFactory.createGenerator(YAMLFactory.java:441)
        at com.fasterxml.jackson.dataformat.yaml.YAMLFactory.createGenerator(YAMLFactory.java:15)
        at com.fasterxml.jackson.databind.ObjectWriter.createGenerator(ObjectWriter.java:703)
        at com.fasterxml.jackson.databind.ObjectWriter.writeValueAsString(ObjectWriter.java:1086)
        at io.smallrye.openapi.runtime.io.OpenApiSerializer.serialize(OpenApiSerializer.java:48)
        at io.smallrye.openapi.gradleplugin.SmallryeOpenApiTask.write(SmallryeOpenApiTask.java:298)
        at io.smallrye.openapi.gradleplugin.SmallryeOpenApiTask.generate(SmallryeOpenApiTask.java:119)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

This can be traced down to a different version of jackson-core being used (that has the JSONFactory class) vs jackson-dataformat-yaml (that has `YAMLFactory, calling the _createContentReference() method).

Plugin classpath:

> Task :public:api:buildEnvironment

------------------------------------------------------------
Project ':public:api'
------------------------------------------------------------

classpath
\--- io.smallrye.openapi:io.smallrye.openapi.gradle.plugin:3.1.2-SNAPSHOT
     \--- io.smallrye:smallrye-open-api-gradle-plugin:3.1.2-SNAPSHOT
          +--- io.smallrye:smallrye-open-api-core:3.1.2-SNAPSHOT
          |    +--- org.eclipse.microprofile.openapi:microprofile-openapi-api:3.1
          |    +--- org.eclipse.microprofile.config:microprofile-config-api:3.0
          |    +--- com.fasterxml.jackson.core:jackson-core:2.13.4
          |    |    \--- com.fasterxml.jackson:jackson-bom:2.13.4
          |    |         +--- com.fasterxml.jackson.core:jackson-annotations:2.13.4 (c)
          |    |         +--- com.fasterxml.jackson.core:jackson-core:2.13.4 (c)
          |    |         +--- com.fasterxml.jackson.core:jackson-databind:2.13.4 -> 2.13.4.2 (c)
          |    |         \--- com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.13.4 (c)
          |    +--- com.fasterxml.jackson.core:jackson-databind:2.13.4.2
          |    |    +--- com.fasterxml.jackson.core:jackson-annotations:2.13.4
          |    |    |    \--- com.fasterxml.jackson:jackson-bom:2.13.4 (*)
          |    |    +--- com.fasterxml.jackson.core:jackson-core:2.13.4 (*)
          |    |    \--- com.fasterxml.jackson:jackson-bom:2.13.4 (*)
          |    +--- com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.13.4
          |    |    +--- com.fasterxml.jackson.core:jackson-databind:2.13.4 -> 2.13.4.2 (*)
          |    |    +--- org.yaml:snakeyaml:1.31
          |    |    +--- com.fasterxml.jackson.core:jackson-core:2.13.4 (*)
          |    |    \--- com.fasterxml.jackson:jackson-bom:2.13.4 (*)
          |    +--- io.smallrye:jandex:3.0.5
          |    \--- org.jboss.logging:jboss-logging:3.5.0.Final
          +--- io.smallrye:smallrye-open-api-jaxrs:3.1.2-SNAPSHOT
          |    +--- io.smallrye:smallrye-open-api-core:3.1.2-SNAPSHOT (*)
          |    \--- org.jboss.logging:jboss-logging:3.5.0.Final
          +--- io.smallrye:smallrye-open-api-spring:3.1.2-SNAPSHOT
          |    +--- io.smallrye:smallrye-open-api-core:3.1.2-SNAPSHOT (*)
          |    \--- org.jboss.logging:jboss-logging:3.5.0.Final
          \--- io.smallrye:smallrye-open-api-vertx:3.1.2-SNAPSHOT
               +--- io.smallrye:smallrye-open-api-core:3.1.2-SNAPSHOT (*)
               \--- org.jboss.logging:jboss-logging:3.5.0.Final

(c) - dependency constraint
(*) - dependencies omitted (listed previously)

Workaround

Works when I revert to Jackson 2.12.0 in the main pom.xml of the SmallRye project and rebuild the plugin.

[Hes-Siemelink]

Was not fixed by #1342

Plugin does work with a sample project.

Since gradle buildEnvironment gives the correct plugin class path it most probably either a misconfiguration in the project or an error in how gradle loads the classpath and leaves a different jackson version lingering somewhere.

[MikeEdgar]

@Hes-Siemelink , if you can provide a reproducer project that has this problem, I could help look at it. As you've said, it's may not an issue with the plugin, but the additional Jackson version on the classpath. If you enable debug logging when running the plugin, you should see statements like this:

Adding X to annotation scanner class loader

where X is the jar file being added. That might help confirm what is present during the scan.

[Hes-Siemelink]

This is what I see

 cat build.log | grep jackson | grep "annotation scanner"
2023-01-16T17:03:16.439+0100 [DEBUG] [org.gradle.api.Task] Adding /Users/hsiemelink/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-core/2.14.1/7a07bc535ccf0b7f6929c4d0f2ab9b294ef7c4a3/jackson-core-2.14.1.jar to annotation scanner class loader
2023-01-16T17:03:16.439+0100 [DEBUG] [org.gradle.api.Task] Adding /Users/hsiemelink/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-databind/2.14.1/268524b9056cae1211b9f1f52560ef19347f4d17/jackson-databind-2.14.1.jar to annotation scanner class loader
2023-01-16T17:03:16.439+0100 [DEBUG] [org.gradle.api.Task] Adding /Users/hsiemelink/.gradle/caches/modules-2/files-2.1/com.fasterxml.jackson.core/jackson-annotations/2.14.1/2a6ad504d591a7903ffdec76b5b7252819a2d162/jackson-annotations-2.14.1.jar to annotation scanner class loader

Looks good to me. I will ping you if I find something that points to the plugin... For now doesn't seem to be the first candidate of causing the error.

Thanks again!