19:12:54 java.util.ConcurrentModificationException 19:12:54 at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) 19:12:54 at java.util.HashMap$KeyIterator.next(HashMap.java:1469) 19:12:54 at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) 19:12:54 at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:264) 19:12:54 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:251) 19:12:54 Caused: java.lang.RuntimeException: Failed to serialize com.google.jenkins.plugins.storage.reports.BuildGcsUploadReport#files for class com.google.jenkins.plugins.storage.reports.BuildGcsUploadReport 19:12:54 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:255) 19:12:54 at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:223) 19:12:54 at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) 19:12:54 at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209) 19:12:54 at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) 19:12:54 at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) 19:12:54 at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:74) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) 19:12:54 at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:264) 19:12:54 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:251) 19:12:54 Caused: java.lang.RuntimeException: Failed to serialize hudson.model.Actionable#actions for class org.jenkinsci.plugins.workflow.job.WorkflowRun 19:12:54 at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:255) 19:12:54 at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:223) 19:12:54 at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138) 19:12:54 at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:209) 19:12:54 at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:150) 19:12:54 at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43) 19:12:54 at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82) 19:12:54 at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) 19:12:54 at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026) 19:12:54 at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015) 19:12:54 at com.thoughtworks.xstream.XStream.toXML(XStream.java:988) 19:12:54 at hudson.util.XStream2.toXMLUTF8(XStream2.java:313) 19:12:54 at org.jenkinsci.plugins.workflow.support.PipelineIOUtils.writeByXStream(PipelineIOUtils.java:34) 19:12:54 at org.jenkinsci.plugins.workflow.job.WorkflowRun.save(WorkflowRun.java:1199) 19:12:54 at hudson.BulkChange.commit(BulkChange.java:98) 19:12:54 at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1475) 19:12:54 at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.run(CpsThreadGroup.java:489) 19:12:54 at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$1.run(CpsVmExecutorService.java:38) 19:12:54 at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:136) 19:12:54 at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) 19:12:54 at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) 19:12:54 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 19:12:54 at java.util.concurrent.FutureTask.run(FutureTask.java:266) 19:12:54 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 19:12:54 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 19:12:54 at java.lang.Thread.run(Thread.java:748)