[JIRA] (JENKINS-62227) Jenkins cannot restart because of NoClassDefFoundError of CloudHelper

['manuelramonleonjime...@gmail.com (JIRA)' via Jenkins Issues]

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Ramon Leon created an issue   Jenkins / JENKINS-62227 Jenkins cannot restart because of NoClassDefFoundError of CloudHelper Issue Type: Bug Assignee: Ramon Leon Components: ec2-plugin Created: 2020-05-09 12:28 Priority: Critical Reporter: Ramon Leon Start Jenkins 2.235 without any plugin installation Install ec2-plugin 1.50.2 Configure a ec2 cloud Configure a linux template Run some job to check it works Install manually a new version of ec2-plugin (silly change) to test it Click restart Jenkins Jenkins doesn't start any time you try failing with: 2020-05-09 12:19:26.516+0000 [id=38] WARNING jenkins.model.Jenkins$5#runTask: Loading global config failed perhaps due to plugin dependency issues java.lang.LinkageError: loader constraint violation: when resolving method "org.slf4j.impl.StaticLoggerBinder.getLoggerFactory()Lorg/slf4j/ILoggerFactory;" the class loader (instance of hudson/PluginFirstClassLoader) of the current class, org/slf4j/LoggerFactory, and the class loader (instance of org/eclipse/jetty/webapp/WebAppClassLoader) for the method's defining class, org/slf4j/impl/StaticLoggerBinder, have different Class objects for the type org/slf4j/ILoggerFactory used in the signature at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:418) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383) at hudson.plugins.ec2.CloudHelper.<clinit>(CloudHelper.java:24) at hudson.plugins.ec2.EC2Computer.getState(EC2Computer.java:139) at hudson.plugins.ec2.EC2RetentionStrategy.start(EC2RetentionStrategy.java:241) at hudson.plugins.ec2.EC2RetentionStrategy.start(EC2RetentionStrategy.java:52) at hudson.model.AbstractCIBase.updateComputer(AbstractCIBase.java:162) at hudson.model.AbstractCIBase.access$000(AbstractCIBase.java:44) at hudson.model.AbstractCIBase$2.run(AbstractCIBase.java:224) at hudson.model.Queue._withLock(Queue.java:1398) at hudson.model.Queue.withLock(Queue.java:1275) at hudson.model.AbstractCIBase.updateComputerList(AbstractCIBase.java:207) at jenkins.model.Jenkins.updateComputerList(Jenkins.java:1635) at jenkins.model.Nodes$9.run(Nodes.java:351) at hudson.model.Queue._withLock(Queue.java:1398) at hudson.model.Queue.withLock(Queue.java:1275) at jenkins.model.Nodes.load(Nodes.java:346) at jenkins.model.Jenkins$13.run(Jenkins.java:3254) at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169) at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296) at jenkins.model.Jenkins$5.runTask(Jenkins.java:1131) 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) ... 2020-05-09 12:19:27.321+0000 [id=46] SEVERE hudson.triggers.SafeTimerTask#run: Timer task hudson.slaves.ComputerRetentionWork@5988e277 failed java.lang.NoClassDefFoundError: Could not initialize class hudson.plugins.ec2.CloudHelper at hudson.plugins.ec2.EC2Computer.getState(EC2Computer.java:139) at hudson.plugins.ec2.EC2RetentionStrategy.internalCheck(EC2RetentionStrategy.java:146) at hudson.plugins.ec2.EC2RetentionStrategy.check(EC2RetentionStrategy.java:107) at hudson.plugins.ec2.EC2RetentionStrategy.check(EC2RetentionStrategy.java:52) at hudson.slaves.ComputerRetentionWork$1.run(ComputerRetentionWork.java:70) at hudson.model.Queue._withLock(Queue.java:1398) at hudson.model.Queue.withLock(Queue.java:1275) at hudson.slaves.ComputerRetentionWork.doRun(ComputerRetentionWork.java:61) at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:91) at jenkins.security.ImpersonatingScheduledExecutorService$1.run(ImpersonatingScheduledExecutorService.java:58) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) 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) Add Comment   This message was sent by Atlassian Jira (v7.13.12#713012-sha1:6e07c38) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-issues/JIRA.206163.1589027294000.23977.1589027340107%40Atlassian.JIRA.