[JIRA] (JENKINS-61261) Ivy ClassNotFoundException when using Grab

Issue Type:	Bug
Assignee:	Daniel Heid
Components:	core, postbuildscript-plugin
Created:	2020-02-27 20:07
Environment:	Jenkins LTS docker
Labels:	groovy classpath jenkins ivy
Priority:	Major
Reporter:	Gowtham Subramanian

We are getting the below exception when we try to initialize and configure Jenkins plugins through post build Groovy Script under init.groovy.d. We understood this is the issue with classloader not able to find ivy in its path. However, this is working with 2.176.2 and started breaking from 2.176.3.

@Grab('org.yaml:snakeyaml:1.17')
import java.util.logging.Logger
import org.codehaus.groovy.control.CompilerConfiguration
import org.yaml.snakeyaml.Yaml
....

java.lang.ClassNotFoundException: org.apache.ivy.core.settings.IvySettings at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:565) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) Caused: java.lang.NoClassDefFoundError: org/apache/ivy/core/settings/IvySettings

We performed various work around to resolve this and none of them were successful

Job-DSL or Event Listener plugin cannot used since this is a config script which execute before Jenkins plugin installation/configuration. Similarly none of the pipeline utilities steps can be used at this point.

Cannot copy Ivy.jar to $Jenkins_Home/war/WEB_INF/lib due to the fact we run Jenkins as a docker container and war path will be only exposed after docker run which eventually invokes init.groovy.d script.

Tried adding the jar through classloader.

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dheid@posteo.de (JIRA)

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Feb 27, 2020, 3:25:02 PM2/27/20

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Daniel Heid updated an issue

Jenkins /

Change By:	Daniel Heid
Component/s:	postbuildscript-plugin

dheid@posteo.de (JIRA)

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Feb 27, 2020, 3:25:02 PM2/27/20

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Daniel Heid commented on

I don't think that this has anything to do with the postbuildscript plugin.

dheid@posteo.de (JIRA)

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Feb 27, 2020, 3:25:03 PM2/27/20

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Daniel Heid assigned an issue to Unassigned

Jenkins /

Change By:	Daniel Heid
Assignee:	Daniel Heid

dbeck@cloudbees.com (JIRA)

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Feb 29, 2020, 8:34:05 AM2/29/20

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Daniel Beck closed an issue as Not A Defect

Jenkins /

Change By:	Daniel Beck
Status:	Open Closed
Resolution:	Not A Defect

dbeck@cloudbees.com (JIRA)

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Feb 29, 2020, 8:34:05 AM2/29/20

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Daniel Beck commented on

Unlikely to be a core change given https://github.com/jenkinsci/jenkins/compare/jenkins-2.176.2...jenkins-2.176.3

My best guess is init.groovy scripts see all plugins' classes and their dependencies, and you updated a plugin at the same time that used to have Ivy on the classpath, and now don't.

See https://github.com/jenkinsci/jenkins/pull/2374 for a PR that never got merged, and recent comments indicating plugins that include Ivy.

gowthamsig@gmail.com (JIRA)

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Mar 3, 2020, 3:13:03 PM3/3/20

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Gowtham Subramanian commented on

We stood up 2.176.2 Jenkins with similar plugins (latest version) without any problem. Not sure, if this is a plugin issue.

As per your comment, init.groovy should find all plugin classes and their dependencies. So we also tried installing it with workflow-cps-global-lib as mentioned in the pull request mentioned as a work around. However, when the docker container is getting initialized we can see the below logs where it says started all plugins and fails to find ivy eventually

Running from: /usr/share/jenkins/jenkins.war

webroot: EnvVars.masterEnvVars.get("JENKINS_HOME")

Mar 03, 2020 1:50:38 PM org.eclipse.jetty.util.log.Log initialized

INFO: Logging initialized @673ms to org.eclipse.jetty.util.log.JavaUtilLog

Mar 03, 2020 1:50:38 PM winstone.Logger logInternal

INFO: Beginning extraction from war file

Mar 03, 2020 1:50:39 PM org.eclipse.jetty.server.handler.ContextHandler setContextPath

WARNING: Empty contextPath

Mar 03, 2020 1:50:39 PM org.eclipse.jetty.server.Server doStart

INFO: jetty-9.4.z-SNAPSHOT; built: 2019-02-15T16:53:49.381Z; git: eb70b240169fcf1abbd86af36482d1c49826fa0b; jvm 1.8.0_222-b10

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.webapp.StandardDescriptorProcessor visitServlet

INFO: NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.server.session.DefaultSessionIdManager doStart

INFO: DefaultSessionIdManager workerName=node0

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.server.session.DefaultSessionIdManager doStart

INFO: No SessionScavenger set, using defaults

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.server.session.HouseKeeper startScavenging

INFO: node0 Scavenging every 660000ms

Jenkins home directory: /var/jenkins_home found at: EnvVars.masterEnvVars.get("JENKINS_HOME")

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.server.handler.ContextHandler doStart

INFO: Started w.@66971f6b{Jenkins v2.176.3,/,file:///var/jenkins_home/war/,AVAILABLE}

{/var/jenkins_home/war}

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.server.AbstractConnector doStart

INFO: Started ServerConnector@53499d85{HTTP/1.1,[http/1.1]}

{0.0.0.0:8080}

Mar 03, 2020 1:50:40 PM org.eclipse.jetty.server.Server doStart

INFO: Started @3387ms

Mar 03, 2020 1:50:40 PM winstone.Logger logInternal

INFO: Winstone Servlet Engine v4.0 running: controlPort=disabled

Mar 03, 2020 1:50:43 PM jenkins.InitReactorRunner$1 onAttained

INFO: Started initialization

Mar 03, 2020 1:50:43 PM jenkins.InitReactorRunner$1 onAttained

INFO: Listed all plugins

Mar 03, 2020 1:50:45 PM jenkins.InitReactorRunner$1 onAttained

INFO: Prepared all plugins

Mar 03, 2020 1:50:45 PM jenkins.InitReactorRunner$1 onAttained

INFO: Started all plugins

Mar 03, 2020 1:50:45 PM jenkins.InitReactorRunner$1 onAttained

INFO: Augmented all extensions

Mar 03, 2020 1:50:46 PM jenkins.InitReactorRunner$1 onAttained

INFO: Loaded all jobs

Mar 03, 2020 1:50:46 PM hudson.model.AsyncPeriodicWork$1 run

INFO: Started Download metadata

Mar 03, 2020 1:50:46 PM hudson.util.Retrier start

INFO: Attempt #1 to do the action check updates server

Mar 03, 2020 1:50:47 PM jenkins.util.groovy.GroovyHookScript execute

INFO: Executing /var/jenkins_home/init.groovy.d/run.groovy

Mar 03, 2020 1:50:47 PM jenkins.model.Jenkins$5 runTask

WARNING: GroovyInitScript.init failed perhaps due to plugin dependency issues

java.lang.Error: java.lang.reflect.InvocationTargetException

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:1095)

at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214)

at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)

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 by: 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)

... 8 more

gowthamsig@gmail.com (JIRA)

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Mar 3, 2020, 3:15:02 PM3/3/20

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Gowtham Subramanian reopened an issue

Jenkins /

Change By:	Gowtham Subramanian
Resolution:	Not A Defect
Status:	Closed Reopened

gowthamsig@gmail.com (JIRA)

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Mar 10, 2020, 9:43:03 AM3/10/20

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Gowtham Subramanian updated

Jenkins /

Change By:	Gowtham Subramanian
Status:	Reopened Fixed but Unreleased
Resolution:	Not A Defect

gowthamsig@gmail.com (JIRA)

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Mar 10, 2020, 9:43:03 AM3/10/20

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Gowtham Subramanian commented on

Found the issue is related to downloaded plugins not present at the plugins path.

gowthamsig@gmail.com (JIRA)

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Mar 10, 2020, 9:43:04 AM3/10/20

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Gowtham Subramanian updated

Jenkins /

Change By:	Gowtham Subramanian
Status:	Fixed but Unreleased Closed