Class not found: io.jenkins.plugins.casc.model.Mapping

[tomlankhorst]

Since the latest release I get this exception.

This is since 1.37, does not occur to my knowledge in 1.36. https://github.com/jenkinsci/configuration-as-code-plugin/compare/configuration-as-code-1.36...configuration-as-code-1.37

YAML lint of configuration file is fine.

org.yaml.snakeyaml.error.YAMLException: Class not found: io.jenkins.plugins.casc.model.Mapping
    at org.yaml.snakeyaml.constructor.Constructor.getClassForNode(Constructor.java:664)
    at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.getConstructor(Constructor.java:322)
    at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:331)
Caused: Can't construct a java object for tag:yaml.org,2002:io.jenkins.plugins.casc.model.Mapping; exception=Class not found: io.jenkins.plugins.casc.model.Mapping
 in /etc/jcasc/jenkins.yaml, line 1, column 1:
    jenkins:
    ^

    at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:336)
    at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:230)
    at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:219)
    at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:173)
    at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:157)
    at io.jenkins.plugins.casc.yaml.YamlUtils.loadFrom(YamlUtils.java:127)
    at io.jenkins.plugins.casc.yaml.YamlUtils.loadFrom(YamlUtils.java:112)
    at io.jenkins.plugins.casc.ConfigurationAsCode.configureWith(ConfigurationAsCode.java:608)
    at io.jenkins.plugins.casc.ConfigurationAsCode.configure(ConfigurationAsCode.java:291)
    at io.jenkins.plugins.casc.ConfigurationAsCode.init(ConfigurationAsCode.java:283)
Caused: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:104)
Caused: java.lang.Error
    at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:110)
    at hudson.init.TaskMethodFinder$TaskImpl.run(TaskMethodFinder.java:175)
    at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296)
    at jenkins.model.Jenkins$5.runTask(Jenkins.java:1133)
    at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214)
    at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
    at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused: org.jvnet.hudson.reactor.ReactorException
    at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:282)
    at jenkins.InitReactorRunner.run(InitReactorRunner.java:50)
    at jenkins.model.Jenkins.executeReactor(Jenkins.java:1166)
    at jenkins.model.Jenkins.<init>(Jenkins.java:966)
    at hudson.model.Hudson.<init>(Hudson.java:85)
    at hudson.model.Hudson.<init>(Hudson.java:81)
    at hudson.WebAppMain$3.run(WebAppMain.java:233)
Caused: hudson.util.HudsonFailedToLoad
    at hudson.WebAppMain$3.run(WebAppMain.java:250)

Your checklist for this issue

🚨 Please review the guidelines for contributing to this repository.

• [x] Jenkins version 2.222.1

• [x] Plugin version 1.37

• [x] OS ubuntu:bionic container in ubuntu bionic

Description

Upon fresh-install, I get this exception.

My plugins.txt file:

github-organization-folder
bitbucket-oauth
ws-cleanup
blueocean-git-pipeline
cloudbees-folder
cloudbees-bitbucket-branch-source
pipeline-model-definition
pipeline-stage-tags-metadata
pipeline-input-step
matrix-project
pipeline-github-lib
ssh-credentials
build-timeout
blueocean
matrix-auth
authorize-project
timestamper
credentials
github-branch-source
github
ssh-slaves
docker-plugin
git
bitbucket
hashicorp-vault-plugin
email-ext
configuration-as-code

[jetersen]

and your jenkins.yaml file?

[jetersen]

Did you install the plugin from GUI or did you preload the plugin?

[timja]

Is the snake yaml api plugin installed?

[ChristianCiach]

Same problem here. Since the update of the plugin just now our jenkins instance doesn't boot anymore, without any changes to our jenkins.yaml or any other changes, except for the rebuild of our docker image that is based on jenkins:lts.

Is the snake yaml api plugin installed?

Let me check that. I was expecting that all dependencies were automatically pulled into the docker image..?

[ChristianCiach]

Is the snake yaml api plugin installed?

Yes, snakeyaml-api is installed. The jpi-file and the folder snakeyaml-api is present inside the plugin-folder.

[timja]

I can reproduce this, downloaded latest version of jenkins, installed suggested plugins, installed jcasc,

added jenkins.yaml:

jenkins:
  systemMessage: testing

[jetersen]

What if we revert #1332 ?

[timja]

I've raised a PR to blacklist this version

[timja]

but yeah could just revert

[jetersen]

Not saying #1332 is the cause but it's a likely suspect.

[timja]

i would put money on it 😉,

Looking at the stacktrace I've seen this before, need to pass the right class loader to snake yaml

[ChristianCiach]

Looking at the stacktrace I've seen this before, need to pass the right class loader to snake yaml

Can confirm. We had similar issues inside our codebase when using SnakeYAML without setting an explicit ClassLoader.

[timja]

Untested fix here: https://github.com/jenkinsci/configuration-as-code-plugin/pull/1340

Will try test later tonight / tomorrow unless anyone else can confirm it works for them

[tomlankhorst]

Thank you for your quick response. @timja 's minimal jenkins.yaml triggers this issue indeed.