Could not apply requested plugin error when using version 1.3.1 of Gradle plugin 'org.jsonschema2pojo'

[NilsDammenhayn]

Upgrading to 1.3.0 worked fine. But setting the version to 1.3.1 and doing a Gradle-refresh provides this error:

Could not apply requested plugin [id: 'org.jsonschema2pojo', version: '1.3.1'] as it does not provide a plugin with id 'org.jsonschema2pojo'. This is caused by an incorrect plugin implementation. Please contact the plugin author(s).
> Plugin with id 'org.jsonschema2pojo' not found.

Using Java 17 with Gradle 9.3.1.

[digsim]

Same issue here with gradle 9.3.1 (and Java 21)

[joelittlejohn]

Thanks for raising this! I had to resolve a duplicate resource problem and it appeared that a file was not needed, but clearly it was. I'm surprised that our 'example' project did not pick this up.

[unkish]

Would it be possible to provide a minimal working example of failing build ?

[joelittlejohn]

I actually can't replicate this issue @NilsDammenhayn @digsim. I've tried with 1.30 and 1.3.1, using both Gradle 8.9 and Gradle 9.3.1. Could you show us how you are using the plugin in your build.gradle? Or provide a minimal example as @unkish says?

[digsim]

I'll try to provide a minimal example this evening after work. We use the plugin like

plugins {
    id "org.openapi.generator" version "${OPENAPI_GENERATOR_VERSION}"
    id "java" // required for jsonschema2pojo
    id "org.jsonschema2pojo" version "${JSONSCHEMA2POJO_VERSION}"
}
...
...
// All parameters: https://github.com/joelittlejohn/jsonschema2pojo/tree/master/jsonschema2pojo-gradle-plugin
jsonSchema2Pojo {
    // /!\ The files need to be in different sub-folders in the specs/jsonschemas folder in order to have different
    // packages to avoid name conflicts
    source = files("$rootDir/specs/jsonschemas")
    targetDirectory = project.layout.buildDirectory.dir("generated/js2p").get().asFile
    targetPackage = 'com.acme.model'
    useBigDecimals = true
    useJakartaValidation = true
    targetVersion = "21"
    dateType = "java.time.LocalDate"
    dateTimeType = "java.time.LocalDateTime"
    formatDateTimes = false
    includeHashcodeAndEquals = false
}
sourceSets.main.java.srcDirs += "build/generated/js2p"
...
...

However, I don't think that the jsonSchema2Pojo is even relevant since gradle complains about the line id "org.jsonschema2pojo" version "${JSONSCHEMA2POJO_VERSION}"

On a side note, we're using the plugin in a multi-module gradle build. I.E we have a structure similar to:

├ specs
│   └── jsonschemas
├ java-modules
│   ├── base
│   │   └── src
│   │   └── build.gradle
│   └── rest-service
│   │   └── src
│   │   └── build.gradle
|── build.gradle 

The snippet above comes from the build.gradle file located in the rest-service subproject folder.

[NilsDammenhayn]

@joelittlejohn I'll try to provide an example tonight!

[digsim]

Out of curiosity I tried version 1.3.0 since we went from 1.2.2 directly to 1.3.1 and there I see a different issue:

* What went wrong:
Execution failed for task ':rest-service:generateJsonSchema2Pojo'.
> class org.apache.commons.lang3.Strings$CsStrings tried to access method 'int org.apache.commons.lang3.CharSequenceUtils.indexOf(java.lang.CharSequence, java.lang.CharSequence, int)' (org.apache.commons.lang3.Strings$CsStrings is in unnamed module of loader org.gradle.internal.classloader.VisitableURLClassLoader$InstrumentingVisitableURLClassLoader @63d617f3; org.apache.commons.lang3.CharSequenceUtils is in unnamed module of loader org.gradle.internal.classloader.VisitableURLClassLoader$InstrumentingVisitableURLClassLoader @664218d2)

BTW with version 1.3.1 I can't even do a ./gradlew tasks without getting

Could not apply requested plugin [id: 'org.jsonschema2pojo', version: '1.3.1'] as it does not provide a plugin with id 'org.jsonschema2pojo'. This is caused by an incorrect plugin implementation. Please contact the plugin author(s).
> Plugin with id 'org.jsonschema2pojo' not found.

[NilsDammenhayn]

I've created this branch. 1.3.0 works fine, changing that version in gradle/libs.versions.toml to 1.3.1 produces the error

[unkish]

I've looked at @NilsDammenhayn repo branch and indeed it fails.
Failure though is due to jsonschema2pojo-gradle-plugin-1.3.1.jar being a tiny bit different:

• https://plugins.gradle.org/m2/org/jsonschema2pojo/jsonschema2pojo-gradle-plugin/1.3.1/jsonschema2pojo-gradle-plugin-1.3.1.jar
  vs
• https://repo.maven.apache.org/maven2/org/jsonschema2pojo/jsonschema2pojo-gradle-plugin/1.3.1/jsonschema2pojo-gradle-plugin-1.3.1.jar

The one on maven central does not have META-INF/gradle-plugins/org.jsonschema2pojo.properties

A way to make sure that gradle loads plugins from gradle plugin portal is to change model/build.gradle.kts from:

buildscript {
  repositories {
    mavenCentral()
  }
}

to

buildscript {
  repositories {
    gradlePluginPortal()
    mavenCentral()
  }
}

[digsim]

Indeed, the root-cause is similar on my side. I'm using JFrog as a proxy for all artifact resolution, and I had to re-setup the gradlePluginPortal repo. That proxy has been in place for some years and always worked. Can't explain why it broke today for exactly this dependency...

[unkish]

Can't explain why it broke today for exactly this dependency

I'll speculate that this is most probably due to JFrog proxying artifact resolution from maven central (maybe even having gradle plugin portal as a failover).
As version 1.3.1 itself is present in maven central but artifact is missing a org.jsonschema2pojo.properties file - build fails.

[NilsDammenhayn]

Thanks for the workaround @unkish !
One more hint for others: the order of the repositories is important, gradlePluginPortal has to be checked first here.

[unkish]

Thanks for the workaround @unkish ! One more hint for others: the order of the repositories is important, gradlePluginPortal has to be checked first here.

Just a minute note: it seems to be in case when buildscript repositories is used.
I've tried your example with following model/build.gradle.kts:

plugins {
  alias(libs.plugins.jsonSchema2Pojo)
}

repositories {
    mavenCentral()
}
...

Note how there is no

buildscript {
  repositories {
    mavenCentral()
  }
}

in the beginning of the script and jsonSchema2Pojo plugin got downloaded from gradle plugin portal.

P.S. Thank you for providing a reproducer.