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  1. Jenkins
  2. JENKINS-41037

Unable to serialize lists because of ConcurrentModificationException

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    • workflow-cps-global-lib 2.18

      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

          [JENKINS-41037] Unable to serialize lists because of ConcurrentModificationException

          Oliver Gondža added a comment -

          Proposing fix. Tested on resource-disposer-plugin.

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

          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)

          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)

          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

          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

          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.

          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.

          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)

          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)

          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)

           

          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)  

          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

           

          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  

          Michał Woś added a comment -

          +1, as above.

          Michał Woś added a comment - +1, as above.

          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.

          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.

          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.

          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 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 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 .

          Andrew Holland added a comment -

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

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

          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 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 .

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

              Created:
              Updated: