java.lang.RuntimeException: Failed to serialize jenkins.model.Jenkins#slaves for class hudson.model.Hudson 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 jenkins.model.Jenkins.save(Jenkins.java:2675) at hudson.util.PersistedList.onModified(PersistedList.java:173) at hudson.util.PersistedList.replaceBy(PersistedList.java:85) at hudson.model.Slave.<init>(Slave.java:164) at hudson.slaves.AbstractCloudSlave.<init>(AbstractCloudSlave.java:50) at com.cloudbees.jenkins.plugins.mtslavescloud.MansionSlave.<init>(MansionSlave.java:71) at com.cloudbees.jenkins.plugins.mtslavescloud.PlannedMansionSlave.call(PlannedMansionSlave.java:234) at com.cloudbees.jenkins.plugins.mtslavescloud.PlannedMansionSlave.call(PlannedMansionSlave.java:72) at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.jenkins.plugins.mtslavescloud.MansionSlave#vm for class com.cloudbees.jenkins.plugins.mtslavescloud.MansionSlave 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) at hudson.slaves.NodeList$ConverterImpl.marshal(NodeList.java:151) at hudson.util.XStream2$AssociatedConverterImpl.marshal(XStream2.java:358) 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) ... 26 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.mtslaves.client.RemoteReference#token for class com.cloudbees.mtslaves.client.VirtualMachineRef 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 42 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.api.TokenGenerator$1#this$0 for class com.cloudbees.api.TokenGenerator$1 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 51 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.api.CachedTokenGenerator#cache for class com.cloudbees.api.CachedTokenGenerator 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 60 more Caused by: java.lang.RuntimeException: Failed to serialize com.google.common.cache.LocalCache$ManualSerializationProxy#loader for class com.google.common.cache.LocalCache$LoadingSerializationProxy 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 69 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.api.CachedTokenGenerator$1#val$base for class com.cloudbees.api.CachedTokenGenerator$1 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 78 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.api.TokenGenerator$2#val$client for class com.cloudbees.api.TokenGenerator$2 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 87 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.api.OauthClientImpl#bees for class com.cloudbees.api.OauthClientImpl 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 96 more Caused by: java.lang.RuntimeException: Failed to serialize com.cloudbees.api.BeesClientBase#logger for class com.cloudbees.api.BeesClient 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 105 more Caused by: java.lang.RuntimeException: Failed to serialize java.util.logging.Logger#manager for class java.util.logging.Logger 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 114 more Caused by: java.lang.RuntimeException: Failed to serialize java.util.logging.LogManager#systemContext for class java.util.logging.LogManager 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 123 more Caused by: java.lang.RuntimeException: Failed to serialize java.util.logging.LogManager$LoggerContext#namedLoggers for class java.util.logging.LogManager$SystemLoggerContext 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 132 more Caused by: java.lang.RuntimeException: Failed to serialize java.lang.ref.Reference#referent for class java.util.logging.LogManager$LoggerWeakRef 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) at com.thoughtworks.xstream.converters.collections.MapConverter.marshal(MapConverter.java:79) 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) ... 141 more Caused by: java.lang.RuntimeException: Failed to serialize java.util.logging.Logger#parent for class java.util.logging.Logger 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 156 more Caused by: java.lang.RuntimeException: Failed to serialize java.util.logging.Logger#handlers for class java.util.logging.LogManager$RootLogger 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 165 more Caused by: java.lang.RuntimeException: Failed to serialize hudson.WebAppMain$1#this$0 for class hudson.WebAppMain$1 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.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:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 174 more Caused by: java.lang.RuntimeException: Failed to serialize hudson.WebAppMain#initThread for class hudson.WebAppMain 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 189 more Caused by: java.lang.RuntimeException: Failed to serialize java.lang.Thread#contextClassLoader for class hudson.WebAppMain$3 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 198 more Caused by: java.lang.RuntimeException: Failed to serialize org.mortbay.jetty.webapp.WebAppClassLoader#_context for class org.jenkinsci.maven.plugins.hpi.RunMojo$2 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 207 more Caused by: java.lang.RuntimeException: Failed to serialize org.mortbay.jetty.handler.AbstractHandler#_server for class org.mortbay.jetty.webapp.WebAppContext 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 216 more Caused by: java.lang.RuntimeException: Failed to serialize org.mortbay.jetty.Server#_threadPool for class org.mortbay.jetty.Server 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 225 more Caused by: java.lang.RuntimeException: Failed to serialize org.mortbay.thread.BoundedThreadPool#_threads for class org.mortbay.thread.BoundedThreadPool 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 234 more Caused by: java.lang.RuntimeException: Failed to serialize java.lang.Thread#group for class org.mortbay.thread.BoundedThreadPool$PoolThread 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.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:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 243 more Caused by: java.lang.RuntimeException: Failed to serialize java.lang.ThreadGroup#parent for class java.lang.ThreadGroup 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 258 more Caused by: java.lang.RuntimeException: Failed to serialize java.lang.ThreadGroup#threads for class java.lang.ThreadGroup 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84) at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:223) at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:210) ... 267 more Caused by: java.lang.RuntimeException: Failed to serialize java.lang.Thread#target for class java.lang.Thread 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.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:64) at com.thoughtworks.xstream.converters.collections.ArrayConverter.marshal(ArrayConverter.java:45) 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) ... 276 more Caused by: com.thoughtworks.xstream.converters.ConversionException: Could not call sun.net.www.http.KeepAliveCache.writeObject() : Could not call sun.net.www.http.ClientVector.writeObject() : null ---- Debugging information ---- message : Could not call sun.net.www.http.ClientVector.writeObject() cause-exception : java.io.NotSerializableException cause-message : null ------------------------------- message : Could not call sun.net.www.http.KeepAliveCache.writeObject() cause-exception : com.thoughtworks.xstream.converters.ConversionException cause-message : Could not call sun.net.www.http.ClientVector.writeObject() : null ------------------------------- at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callWriteObject(SerializationMethodInvoker.java:141) at com.thoughtworks.xstream.converters.reflection.SerializableConverter.doMarshal(SerializableConverter.java:259) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.marshal(AbstractReflectionConverter.java:83) 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) ... 291 more Caused by: com.thoughtworks.xstream.converters.ConversionException: Could not call sun.net.www.http.ClientVector.writeObject() : null ---- Debugging information ---- message : Could not call sun.net.www.http.ClientVector.writeObject() cause-exception : java.io.NotSerializableException cause-message : null ------------------------------- at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callWriteObject(SerializationMethodInvoker.java:141) at com.thoughtworks.xstream.converters.reflection.SerializableConverter.doMarshal(SerializableConverter.java:259) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.marshal(AbstractReflectionConverter.java:83) 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.reflection.SerializableConverter$1.writeToStream(SerializableConverter.java:140) at com.thoughtworks.xstream.core.util.CustomObjectOutputStream.writeObjectOverride(CustomObjectOutputStream.java:84) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:343) at java.util.HashMap.writeObject(HashMap.java:1129) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callWriteObject(SerializationMethodInvoker.java:135) ... 298 more Caused by: java.io.NotSerializableException at sun.net.www.http.ClientVector.writeObject(KeepAliveCache.java:285) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callWriteObject(SerializationMethodInvoker.java:135) ... 313 more