After updating Jenkins from 2.142 to 2.144 via yum, Jenkins does not successfully start up. On accessing the web UI the following exception is displayed:
java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.ComparableTimSort.mergeHi(ComparableTimSort.java:866)
at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:483)
at java.util.ComparableTimSort.mergeForceCollapse(ComparableTimSort.java:422)
at java.util.ComparableTimSort.sort(ComparableTimSort.java:222)
at java.util.Arrays.sort(Arrays.java:1312)
at java.util.Arrays.sort(Arrays.java:1506)
at java.util.ArrayList.sort(ArrayList.java:1462)
at java.util.Collections.sort(Collections.java:141)
at hudson.ExtensionList.sort(ExtensionList.java:400)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:320)
at hudson.ExtensionList.iterator(ExtensionList.java:172)
at jenkins.model.Jenkins.getDescriptorByType(Jenkins.java:1522)
at hudson.plugins.copyartifact.BuildSelectorParameter.initAliases(BuildSelectorParameter.java:158)
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:1066)
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: org.jvnet.hudson.reactor.ReactorException
at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:282)
at jenkins.InitReactorRunner.run(InitReactorRunner.java:48)
at jenkins.model.Jenkins.executeReactor(Jenkins.java:1100)
at jenkins.model.Jenkins.<init>(Jenkins.java:904)
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)
Page generated: Oct 4, 2018 12:34:51 PM CESTJenkins ver. 2.144
In the jenkins.log log file there are many exceptions. I will attach text files with examples. Some of the exceptions seem to point to the Gradle Plugin but I may be wrong about that. I can't easily uninstall the Gradle Plugin to test, because we depend on two plugins which have the Gradle Plugin as a dependency.
For now a Jenkins downgrade to 2.142 solves the issue.