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OpenAPITools / openapi-generator

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)
https://openapi-generator.tech
Apache License 2.0
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[BUG] java.lang.UnsupportedClassVersionError: org/openapitools/codegen/OpenAPIGenerator has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0 #19024

Closed stevebeauge closed 2 days ago

stevebeauge commented 2 days ago

Bug Report Checklist

Description

The cli does not works on windows because of some weird java issues.

The CLI installation page does not mention any prerequisite.

The @openapitools/openapi-generator-cli only say java should be installed and available on path.

The documentation seems to be incomplete regarding the actual setup requirements.

Side note: I don't know how java works, maybe I miss something that should be obvious for java dev.

openapi-generator version

Latest (2.13.4)

OpenAPI declaration file content or url

Does not matter

Generation Details
Steps to reproduce

Install the cli using pnpm

pnpm -g i @openapitools/openapi-generator-cli

Run it

 openapi-generator-cli version --full

Result:

C:\Users\steve\AppData\Local\pnpm\global\5\.pnpm\@openapitools+openapi-generator-cli@2.13.4_encoding@0.1.13\node_modules\@openapitools\openapi-generator-cli\main.js:2
(()=>{"use strict";var e=[,e=>{e.exports=require("@nestjs/core")},(e,t,r)=>{var i,o,a;Object.defineProperty(t,"__esModule",{value:!0}),t.AppModule=void 0;const s=r(3),n=r(4),p=r(5),c=r(6),l=r(7),d=r(8),g=r(10),h=r(28),u=process.env.HTTP_PROXY||process.env.HTTPS_PROXY,m={};u&&(m.proxy=!1,m.httpsAgent=new h.HttpsProxyAgent(u));let f=class AppModule{constructor(e,t,r){this.program=e,this.versionManager=t,this.passThroughService=r,this.onApplicationBootstrap=async()=>{let e=this.versionManager.getSelectedVersion();if(!e){const[{version:t}]=await this.versionManager.search(["latest"]).toPromise();await this.versionManager.setSelectedVersion(t),e=t}await this.versionManager.downloadIfNeeded(e),await this.passThroughService.init(),this.program.parse(process.argv)}}};t.AppModule=f,t.AppModule=f=s.__decorate([(0,n.Module)({imports:[p.HttpModule.register({...m})],controllers:[d.VersionManagerController],providers:[g.UIService,g.ConfigService,g.GeneratorService,g.PassThroughService,g.VersionManagerService,{provide:l.COMMANDER_PROGRAM,useValue:new c.Command("openapi-generator-cli").helpOption(!1).usage("<command> [<args>]").option("--openapitools <openapitools.json>","Use the specified openapi-generator-cli configuration file")},{provide:l.LOGGER,useValue:console}]}),s.__param(0,(0,n.Inject)(l.COMMANDER_PROGRAM)),s.__metadata("design:paramtypes",["function"==typeof(i=void 0!==c.Command&&c.Command)?i:Object,"function"==typeof(o=void 0!==g.VersionManagerService&&g.VersionManagerService)?o:Object,"function"==typeof(a=void 0!==g.PassThroughService&&g.PassThroughService)?a:Object])],f)},e=>{e.exports=require("tslib")},e=>{e.exports=require("@nestjs/common")},e=>{e.exports=require("@nestjs/axios")},e=>{e.exports=require("commander")},(e,t)=>{Object.defineProperty(t,"__esModule",{value:!0}),t.COMMANDER_PROGRAM=t.LOGGER=void 0,t.LOGGER=Symbol("LOGGER"),t.COMMANDER_PROGRAM=Symbol("COMMANDER_PROGRAM")},(e,t,r)=>{var i,o,a,s;Object.defineProperty(t,"__esModule",{value:!0}),t.VersionManagerController=void 0;const n=r(3),p=r(4),c=r(7),l=r(6),d=n.__importDefault(r(9)),g=r(10);let h=class VersionManagerController{constructor(e,t,r,i){this.logger=e,this.program=t,this.ui=r,this.service=i,this.mainCommand=this.program.command("version-manager").description("Manage used / installed generator version"),this.listCommand=this.mainCommand.command("list [versionTags...]").description("lists all published versions").option("-j, --json","print as json",!1).action((e=>this.list(e))),this.setCommand=this.mainCommand.command("set <versionTags...>").description("set version to use").action((e=>this.set(e))),this.list=async e=>{const t=await this.service.search(e).toPromise();if(this.listCommand.opts().json)return void this.logger.log(JSON.stringify(t,null,2));if(t.length<1)return void this.logger.log(d.default.red("No results for: "+e.join(" ")));const{version:r,installed:i}=await this.table(t),o=await this.service.isSelectedVersion(r),a=(e,t=(()=>null),r=(e=>e))=>({name:r(e),value:t}),s=[a("exit")];i?o||s.unshift(a("remove",(()=>this.service.remove(r)),d.default.red)):s.unshift(a("download",(()=>this.service.download(r)),d.default.yellow)),o||s.unshift(a("use",(()=>this.service.setSelectedVersion(r)),d.default.green)),await(await this.ui.list({name:"next",message:"Whats next?",choices:s}))()},this.set=async e=>{const t=await this.service.search(e).toPromise();t.length>0?await this.service.setSelectedVersion(t[0].version):this.logger.log(d.default.red(`Unable to find version matching criteria "${e.join(" ")}"`))},this.table=e=>this.ui.table({printColNum:!1,message:"The following releases are available:",name:"version",rows:e.map((e=>{const t=e.versionTags.includes("stable"),r=this.service.isSelectedVersion(e.version),i=e.versionTags.map((e=>"latest"===e?d.default.green(e):e));return{value:e,short:e.version,row:{"\u2610":r?"\u2612":"\u2610",releasedAt:e.releaseDate.toISOString().split("T")[0],version:t?d.default.yellow(e.version):d.default.gray(e.version),installed:e.installed?d.default.green("yes"):d.default.red("no"),versionTags:i.join(" ")}}}))})}};t.VersionManagerController=h,t.VersionManagerController=h=n.__decorate([(0,p.Controller)(),n.__param(0,(0,p.Inject)(c.LOGGER)),n.__param(1,(0,p.Inject)(c.COMMANDER_PROGRAM)),n.__metadata("design:paramtypes",["function"==typeof(i=void 0!==c.LOGGER&&c.LOGGER)?i:Object,"function"==typeof(o=void 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g.resolve(this.storage,`${e}.jar`)}};t.VersionManagerService=w,t.VersionManagerService=w=s.__decorate([(0,n.Injectable)(),s.__param(0,(0,n.Inject)(f.LOGGER)),s.__metadata("design:paramtypes",["function"==typeof(i=void 0!==f.LOGGER&&f.LOGGER)?i:Object,"function"==typeof(o=void 0!==p.HttpService&&p.HttpService)?o:Object,"function"==typeof(a=void 0!==v.ConfigService&&v.ConfigService)?a:Object])],w)},e=>{e.exports=require("rxjs/operators")},e=>{e.exports=require("compare-versions")},e=>{e.exports=JSON.parse('{"$id":"https://openapitools.org/openapi-generator-cli/config.schema.json","$schema":"http://json-schema.org/draft-07/schema#","title":"OpenAPI Generator CLI - 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Separate by comma to run many generators").action((async(e,t)=>{if(0===t.args.length||t.opts().generatorKey){const e=this.program.opts()?.customGenerator,r=t.opts().generatorKey||[];if(this.generatorService.enabled)return void(await this.generatorService.generate(e,...r)||(this.logger.log(l.default.red("Code generation failed")),process.exit(1)))}this.passThrough(t)}))}cmd(){if(this.configService.useDocker)return[`docker run --rm -v "${this.configService.cwd}:/local"`,this.versionManager.getDockerImageName()].join(" ");const e=this.program.opts()?.customGenerator,t=this.versionManager.filePath(),r=e?`-cp "${[t,e].join(this.isWin()?";":":")}" org.openapitools.codegen.OpenAPIGenerator`:`-jar "${t}"`;return["java",process.env.JAVA_OPTS,r].filter(h.isString).join(" ")}printHelp(e){console.log(l.default.cyanBright(e.helpInformation()))}};t.PassThroughService=y,t.PassThroughService=y=p.__decorate([(0,c.Injectable)(),p.__param(0,(0,c.Inject)(u.LOGGER)),p.__param(1,(0,c.Inject)(u.COMMANDER_PROGRAM)),p.__metadata("design:paramtypes",["function"==typeof(i=void 0!==u.LOGGER&&u.LOGGER)?i:Object,"function"==typeof(o=void 0!==g.Command&&g.Command)?o:Object,"function"==typeof(a=void 0!==f.VersionManagerService&&f.VersionManagerService)?a:Object,"function"==typeof(s=void 0!==v.ConfigService&&v.ConfigService)?s:Object,"function"==typeof(n=void 0!==m.GeneratorService&&m.GeneratorService)?n:Object])],y)},e=>{e.exports=require("https-proxy-agent")}],t={};function r(i){var o=t[i];if(void 0!==o)return o.exports;var a=t[i]={exports:{}};return e[i](a,a.exports,r),a.exports}var i={};(()=>{var e=i;Object.defineProperty(e,"__esModule",{value:!0});const t=r(1),o=r(2);!async function(){await t.NestFactory.createApplicationContext(o.AppModule,{logger:!1})}()})();var o=exports;for(var a in i)o[a]=i[a];i.__esModule&&Object.defineProperty(o,"__esModule",{value:!0})})();

Error: Exception in thread "main" java.lang.UnsupportedClassVersionError: org/openapitools/codegen/OpenAPIGenerator has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

    at C:\Users\steve\AppData\Local\pnpm\global\5\.pnpm\@openapitools+openapi-generator-cli@2.13.4_encoding@0.1.13\node_modules\@openapitools\openapi-generator-cli\main.js:2:27569
    at ChildProcess.exithandler (node:child_process:430:5)
    at ChildProcess.emit (node:events:518:28)
    at maybeClose (node:internal/child_process:1105:16)
    at ChildProcess._handle.onexit (node:internal/child_process:305:5)

Node.js v20.11.1

I do have the latest java runtime installed:

> java -version                                                                                                                                                                                               
java version "1.8.0_411"
Java(TM) SE Runtime Environment (build 1.8.0_411-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.411-b09, mixed mode)
Related issues/PRs

Found this issue: https://github.com/OpenAPITools/openapi-generator/pull/14177 with the same error, but don't see any related resolution.

Suggest a fix
stevebeauge commented 2 days ago

As a workaround, I downloaded the latest openjdk and tweak the env before running the cli:

$newPath = $env:Path.split(";") | ? { $_ -notmatch "java" } -join ";"
$newPath += ";C:\Users\steve\Downloads\openjdk-22.0.1_windows-x64_bin\jdk-22.0.1"
$env:Path = $newPath
$env:JAVA_HOME = "C:\Users\steve\Downloads\openjdk-22.0.1_windows-x64_bin\jdk-22.0.1"
openapi-generator-cli version --full

Produces:

openapi-generator-cli 7.6.0
  commit : ab7d0cb
  built  : -999999999-01-01T00:00:00+18:00
  source : https://github.com/openapitools/openapi-generator
  docs   : https://openapi-generator.tech/

It may unblock my one time command, but it's not viable for day to day usage

wing328 commented 2 days ago

java version "1.8.0_411"

we no longer support jdk8

please use JDK 11 or newer versions

wing328 commented 2 days ago

another way is to use Docker CLI: https://hub.docker.com/r/openapitools/openapi-generator-cli

tutorial: https://www.youtube.com/watch?v=9MuEP01h1XU

stevebeauge commented 2 days ago

My java installation is up to date : image

if jdk or anything else has to be installed, it should be stated in the doc

wing328 commented 2 days ago

what JDK version are you using now?

stevebeauge commented 2 days ago

As I said, I'm not a java developer, so I'll explain in my own words.

I installed java latest version from oracle website.

After trying to use the generator, I search the web and found some jdk related issues, so I gave a chance to openjdk (as stated in my previous comment by unziping and overriding the paths), which is v22.

So I've version 1.18 of java, v 22 of openjdk and now I don't get any class version error of whatever it means with version unrelated to java version.

wing328 commented 2 days ago

so everything works for you now, right?

stevebeauge commented 2 days ago

I worked around yes. But the point is that the doc isn't clear regarding the requirements, and I guess it would be nice to have a clear list of prerequisites.

wing328 commented 21 hours ago

thanks for the feedback. updated README in https://github.com/OpenAPITools/openapi-generator-cli with JDK11 as the minimal version supported

have a nice weekend

stevebeauge commented 21 hours ago

Thanks for the support and the update.