Uploaded image for project: 'Jenkins'
  1. Jenkins
  2. JENKINS-41037

Unable to serialize lists because of ConcurrentModificationException

    XMLWordPrintable

Details

    • workflow-cps-global-lib 2.18

    Description

      This keeps up reported as Flaked tests as it seems to clash with some other test (related activity) and gets retried correctly. (Using synchronized mocks makes no difference).

      Reproducible by https://github.com/jenkinsci/resource-disposer-plugin/commit/bc5f00008cc31a680e103dd7bd804bd64b0a4668 and mvn clean package. Not by mvn clean package -Dtest=AsyncResourceDisposerTest#combined of course.

      Caused by: java.util.ConcurrentModificationException
      	at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:953)
      	at java.util.LinkedList$ListItr.next(LinkedList.java:886)
      	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
      	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
      	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
      	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
      	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223)
      	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210)
      	... 128 more
      

      Attachments

        Issue Links

          Activity

            Proposing fix. Tested on resource-disposer-plugin.

            olivergondza Oliver Gondža added a comment - Proposing fix. Tested on resource-disposer-plugin.

            Yet another instance of the same:

            ERROR: Unexpected error in launching a slave. This is probably a bug in Jenkins
            ESC[8mha:AAAAWB+LCAAAAAAAAP9b85aBtbiIQSmjNKU4P08vOT+vOD8nVc8DzHWtSE4tKMnMz/PLL0ldFVf2c+b/lb5MDAwVRQxSaBqcITRIIQMEMIIUFgAAckCEiWAAAAA=ESC[0mjava.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.cloudstats.CloudStatistics#active for class org.jenkinsci.plugins.cloudstats.CloudStatistics
                    at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:214)
                    at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:182)
                    at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
                    at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:167)
                    at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:108)
                    at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
                    at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
                    at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
                    at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
                    at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
                    at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
                    at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
                    at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
                    at hudson.XmlFile.write(XmlFile.java:178)
                    at org.jenkinsci.plugins.cloudstats.CloudStatistics.save(CloudStatistics.java:219)
                    at org.jenkinsci.plugins.cloudstats.CloudStatistics$OperationListener.preLaunch(CloudStatistics.java:395)
                    at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:241)
                    at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
                    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
                    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
                    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
                    at java.lang.Thread.run(Thread.java:745)
            Caused by: java.util.ConcurrentModificationException
                    at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719)
                    at java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:742)
                    at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
                    at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
                    at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
                    at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
                    at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223)
                    at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210)
            
            olivergondza Oliver Gondža added a comment - Yet another instance of the same: ERROR: Unexpected error in launching a slave. This is probably a bug in Jenkins ESC[8mha:AAAAWB+LCAAAAAAAAP9b85aBtbiIQSmjNKU4P08vOT+vOD8nVc8DzHWtSE4tKMnMz/PLL0ldFVf2c+b/lb5MDAwVRQxSaBqcITRIIQMEMIIUFgAAckCEiWAAAAA=ESC[0mjava.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.cloudstats.CloudStatistics#active for class org.jenkinsci.plugins.cloudstats.CloudStatistics at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:214) at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:182) at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:167) at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:108) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015) at com.thoughtworks.xstream.XStream.toXML(XStream.java:988) at hudson.XmlFile.write(XmlFile.java:178) at org.jenkinsci.plugins.cloudstats.CloudStatistics.save(CloudStatistics.java:219) at org.jenkinsci.plugins.cloudstats.CloudStatistics$OperationListener.preLaunch(CloudStatistics.java:395) at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:241) at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.util.ConcurrentModificationException at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719) at java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:742) at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210)

            olivergondza any progress on that PR, had almost the same problem several times in the past.

            Extracted from a Multibranch Pipeline of mine
            java.util.ConcurrentModificationException
            	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
            	at java.util.ArrayList$Itr.next(ArrayList.java:859)
            	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:265)
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:252)
            Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:256)
            	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:224)
            	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209)
            	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)
            	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64)
            	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:265)
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:252)
            Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:256)
            	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:224)
            	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209)
            	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            	at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
            	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
            	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
            	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
            	at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
            	at hudson.util.XStream2.toXMLUTF8(XStream2.java:313)
            	at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34)
            	at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1142)
            	at hudson.BulkChange.commit(BulkChange.java:98)
            	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1453)
            	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:417)
            	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:35)
            	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
            	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
            	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
            	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
            	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
            	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)
            Finished: FAILURE
            
            bparsapo Bahram Parsapour added a comment - olivergondza any progress on that PR, had almost the same problem several times in the past. Extracted from a Multibranch Pipeline of mine java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909) at java.util.ArrayList$Itr.next(ArrayList.java:859) at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:265) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:252) Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:256) at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:224) at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209) at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:265) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:252) Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:256) at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:224) at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209) at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015) at com.thoughtworks.xstream.XStream.toXML(XStream.java:988) at hudson.util.XStream2.toXMLUTF8(XStream2.java:313) at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34) at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1142) at hudson.BulkChange.commit(BulkChange.java:98) at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1453) at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:417) at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:35) at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131) at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) 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) Finished: FAILURE

            We ran into this issue on the first build of a branch pipeline job. Same exact stack trace as Bahram Parsapour ran into.

            lh99550 Logan Highland added a comment - We ran into this issue on the first build of a branch pipeline job. Same exact stack trace as Bahram Parsapour ran into.
            scoheb Scott Hebert added a comment -

            Issue seen:

            java.util.ConcurrentModificationException
            15:00:02 at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042)
            15:00:02 at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996)
            15:00:02 at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            15:00:02 at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263)
            15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250)
            15:00:02 Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction
            15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254)
            15:00:02 at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222)
            15:00:02 at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            15:00:02 at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208)
            15:00:02 at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)
            15:00:02 at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64)
            15:00:02 at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            15:00:02 at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263)
            15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250)
            15:00:02 Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun
            15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254)
            15:00:02 at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222)
            15:00:02 at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            15:00:02 at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208)
            15:00:02 at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149)
            15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
            15:00:02 at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
            15:00:02 at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
            15:00:02 at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
            15:00:02 at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
            15:00:02 at hudson.util.XStream2.toXMLUTF8(XStream2.java:313)
            15:00:02 at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34)
            15:00:02 at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1143)
            15:00:02 at hudson.BulkChange.commit(BulkChange.java:98)
            15:00:02 at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1475)
            15:00:02 at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:458)
            15:00:02 at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:37)
            15:00:02 at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
            15:00:02 at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
            15:00:02 at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
            15:00:02 at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
            15:00:02 at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
            15:00:02 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
            15:00:02 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
            15:00:02 at java.base/java.lang.Thread.run(Thread.java:834)

            scoheb Scott Hebert added a comment - Issue seen: java.util.ConcurrentModificationException 15:00:02 at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042) 15:00:02 at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996) 15:00:02 at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) 15:00:02 at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263) 15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250) 15:00:02 Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction 15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254) 15:00:02 at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222) 15:00:02 at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) 15:00:02 at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208) 15:00:02 at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) 15:00:02 at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) 15:00:02 at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) 15:00:02 at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263) 15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250) 15:00:02 Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun 15:00:02 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254) 15:00:02 at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222) 15:00:02 at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) 15:00:02 at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208) 15:00:02 at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149) 15:00:02 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) 15:00:02 at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82) 15:00:02 at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) 15:00:02 at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026) 15:00:02 at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015) 15:00:02 at com.thoughtworks.xstream.XStream.toXML(XStream.java:988) 15:00:02 at hudson.util.XStream2.toXMLUTF8(XStream2.java:313) 15:00:02 at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34) 15:00:02 at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1143) 15:00:02 at hudson.BulkChange.commit(BulkChange.java:98) 15:00:02 at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1475) 15:00:02 at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:458) 15:00:02 at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:37) 15:00:02 at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131) 15:00:02 at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) 15:00:02 at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) 15:00:02 at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) 15:00:02 at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) 15:00:02 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) 15:00:02 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) 15:00:02 at java.base/java.lang.Thread.run(Thread.java:834)
            stephenlclarke Steve Clarke added a comment -

            I see exactly the same issue;
             

            [2020-02-23T12:22:16.287Z] java.util.ConcurrentModificationException
            [2020-02-23T12:22:16.287Z] at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
            [2020-02-23T12:22:16.287Z] at java.util.ArrayList$Itr.next(ArrayList.java:859)
            [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
            [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            [2020-02-23T12:22:16.287Z] at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263)
            [2020-02-23T12:22:16.287Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250)
            [2020-02-23T12:22:16.287Z] Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250)
            [2020-02-23T12:22:16.288Z] Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208)
            [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
            [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
            [2020-02-23T12:22:16.288Z] at hudson.util.XStream2.toXMLUTF8(XStream2.java:313)
            [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34)
            [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1140)
            [2020-02-23T12:22:16.288Z] at hudson.BulkChange.commit(BulkChange.java:98)
            [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1475)
            [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:458)
            [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:37)
            [2020-02-23T12:22:16.288Z] at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
            [2020-02-23T12:22:16.288Z] at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
            [2020-02-23T12:22:16.288Z] at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
            [2020-02-23T12:22:16.288Z] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
            [2020-02-23T12:22:16.288Z] at java.util.concurrent.FutureTask.run(FutureTask.java:266)
            [2020-02-23T12:22:16.288Z] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
            [2020-02-23T12:22:16.288Z] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
            [2020-02-23T12:22:16.288Z] at java.lang.Thread.run(Thread.java:748)
            

             

            stephenlclarke Steve Clarke added a comment - I see exactly the same issue;   [2020-02-23T12:22:16.287Z] java.util.ConcurrentModificationException [2020-02-23T12:22:16.287Z] at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909) [2020-02-23T12:22:16.287Z] at java.util.ArrayList$Itr.next(ArrayList.java:859) [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73) [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) [2020-02-23T12:22:16.287Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) [2020-02-23T12:22:16.287Z] at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263) [2020-02-23T12:22:16.287Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250) [2020-02-23T12:22:16.287Z] Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250) [2020-02-23T12:22:16.288Z] Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208) [2020-02-23T12:22:16.288Z] at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015) [2020-02-23T12:22:16.288Z] at com.thoughtworks.xstream.XStream.toXML(XStream.java:988) [2020-02-23T12:22:16.288Z] at hudson.util.XStream2.toXMLUTF8(XStream2.java:313) [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34) [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1140) [2020-02-23T12:22:16.288Z] at hudson.BulkChange.commit(BulkChange.java:98) [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1475) [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:458) [2020-02-23T12:22:16.288Z] at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:37) [2020-02-23T12:22:16.288Z] at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131) [2020-02-23T12:22:16.288Z] at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) [2020-02-23T12:22:16.288Z] at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) [2020-02-23T12:22:16.288Z] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [2020-02-23T12:22:16.288Z] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [2020-02-23T12:22:16.288Z] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [2020-02-23T12:22:16.288Z] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [2020-02-23T12:22:16.288Z] at java.lang. Thread .run( Thread .java:748)  
            ryanstewart456 Ryan Stewart added a comment -

            I am seeing the same issue when loading libraries dynamically using

            library()
            

            It doesn't seem to matter if the library statement is the first line in the pipeline, nor inside a node.

            I have noticed however that this will almost always happen on build #1 of a multibranch pipeline

            it does on occasion occur on other builds but less frequently 

            [Pipeline] Start of Pipeline
            [Pipeline] library
            Loading library libs@libs
            [Pipeline] End of Pipeline
            java.util.ConcurrentModificationException
            	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
            	at java.util.ArrayList$Itr.next(ArrayList.java:859)
            	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263)
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250)
            Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254)
            	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222)
            	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208)
            	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)
            	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64)
            	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)
            	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263)
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250)
            Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun
            	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254)
            	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222)
            	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)
            	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208)
            	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149)
            	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
            	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
            	at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)
            	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
            	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)
            	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)
            	at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)
            	at hudson.util.XStream2.toXMLUTF8(XStream2.java:313)
            	at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34)
            	at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1142)
            	at hudson.BulkChange.commit(BulkChange.java:98)
            	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1476)
            	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:458)
            	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:35)
            	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
            	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
            	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
            	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
            	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
            	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)
            Finished: FAILURE
            

             

            ryanstewart456 Ryan Stewart added a comment - I am seeing the same issue when loading libraries dynamically using library() It doesn't seem to matter if the library statement is the first line in the pipeline, nor inside a node. I have noticed however that this will almost always happen on build #1 of a multibranch pipeline it does on occasion occur on other builds but less frequently  [Pipeline] Start of Pipeline [Pipeline] library Loading library libs@libs [Pipeline] End of Pipeline java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909) at java.util.ArrayList$Itr.next(ArrayList.java:859) at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250) Caused: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.libs.LibrariesAction#libraries for class org.jenkinsci.plugins.workflow.libs.LibrariesAction at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254) at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222) at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208) at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:263) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:250) Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:254) at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:222) at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:208) at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:149) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015) at com.thoughtworks.xstream.XStream.toXML(XStream.java:988) at hudson.util.XStream2.toXMLUTF8(XStream2.java:313) at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34) at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1142) at hudson.BulkChange.commit(BulkChange.java:98) at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1476) at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:458) at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:35) at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131) at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) 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) Finished: FAILURE  
            mwos Michał Woś added a comment -

            +1, as above.

            mwos Michał Woś added a comment - +1, as above.
            jglick Jesse Glick added a comment -

            Under discussion in https://github.com/x-stream/xstream/pull/222 but probably this will need to be split into distinct issues, one for each collection which is being concurrently modified during save, and each case fixed independently.

            jglick Jesse Glick added a comment - Under discussion in https://github.com/x-stream/xstream/pull/222 but probably this will need to be split into distinct issues, one for each collection which is being concurrently modified during save, and each case fixed independently.
            jglick Jesse Glick added a comment -

            workflow-cps-global-lib-plugin #100 should solve the most-reported issues. Looks like there are a couple more in other plugins.

            jglick Jesse Glick added a comment - workflow-cps-global-lib-plugin #100 should solve the most-reported issues. Looks like there are a couple more in other plugins.
            basil Basil Crow added a comment - - edited

            jenkinsci/resource-disposer-plugin#8 fixes this issue in Resource Disposer's test suite. At the time of this writing, the only remaining known instance of this issue is in Cloud Statistics, as described in this comment.

            basil Basil Crow added a comment - - edited jenkinsci/resource-disposer-plugin#8 fixes this issue in Resource Disposer's test suite. At the time of this writing, the only remaining known instance of this issue is in Cloud Statistics, as described in this comment .

            is there any plan to release a new version of workflow-cps-global-lib-plugin with the fix?

            a1dutch Andrew Holland added a comment - is there any plan to release a new version of workflow-cps-global-lib-plugin with the fix?
            basil Basil Crow added a comment -

            is there any plan to release a new version of workflow-cps-global-lib-plugin with the fix?

            That was done in 2.18.

            basil Basil Crow added a comment - is there any plan to release a new version of workflow-cps-global-lib-plugin with the fix? That was done in 2.18 .

            People

              Unassigned Unassigned
              olivergondza Oliver Gondža
              Votes:
              4 Vote for this issue
              Watchers:
              12 Start watching this issue

              Dates

                Created:
                Updated: