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Published Jun. 30, 2025

NullPointerException/PortletDataException reported when importing lar file

Written By

Emma Liu

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Issue

  • NullPointerException/PortletDataException was reported when importing lar file. The issue can only be reproduced in certain environments with older JDK versions.
15:45:15,910 ERROR [BackgroundTaskMessageListener:182] Unable to execute background task
com.liferay.exportimport.kernel.lar.PortletDataException: Failed calling method_---- Debugging information ----_message : Failed calling method_cause-exception : java.lang.NullPointerException_cause-message : null_method : com.liferay.portal.kernel.util.UnicodeProperties.readObject()_class : com.liferay.portal.kernel.util.UnicodeProperties_required-type : com.liferay.portal.kernel.util.UnicodeProperties_converter-type : com.thoughtworks.xstream.converters.reflection.SerializableConverter_path : /StagedLayoutSet/_layoutSet/_settingsProperties/map_line number : 48_class[1] : com.liferay.portal.model.impl.LayoutSetImpl_required-type[1] : com.liferay.portal.model.impl.LayoutSetImpl_converter-type[1] : com.thoughtworks.xstream.converters.reflection.ReflectionConverter_class[2] : com.liferay.layout.internal.model.adapter.StagedLayoutSetImpl_required-type[2] : com.liferay.layout.internal.model.adapter.StagedLayoutSetImpl_version : 1.4.16_------------------------------- [Sanitized]
at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.importStagedModel(BaseStagedModelDataHandler.java:437)
at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.importStagedModel(StagedModelDataHandlerUtil.java:453)
at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.importStagedModel(StagedModelDataHandlerUtil.java:439)
at com.liferay.exportimport.internal.controller.LayoutImportController.doImportFile(LayoutImportController.java:592)
at com.liferay.exportimport.internal.controller.LayoutImportController.importFile(LayoutImportController.java:221)
at com.liferay.portlet.exportimport.service.impl.ExportImportLocalServiceImpl.importLayouts(ExportImportLocalServiceImpl.java:211)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.liferay.portal.spring.aop.AopMethodInvocationImpl.proceed(AopMethodInvocationImpl.java:50)
at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:69)
at com.liferay.portal.spring.aop.AopMethodInvocationImpl.proceed(AopMethodInvocationImpl.java:57)
at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:49)
at com.sun.proxy.$Proxy354.importLayouts(Unknown Source)
at com.liferay.exportimport.kernel.service.ExportImportLocalServiceUtil.importLayouts(ExportImportLocalServiceUtil.java:122)
at com.liferay.exportimport.internal.background.task.LayoutImportBackgroundTaskExecutor$LayoutImportCallable.call(LayoutImportBackgroundTaskExecutor.java:133)
at com.liferay.exportimport.internal.background.task.LayoutImportBackgroundTaskExecutor$LayoutImportCallable.call(LayoutImportBackgroundTaskExecutor.java:119)
at com.liferay.portal.spring.transaction.BaseTransactionExecutor.execute(BaseTransactionExecutor.java:37)
at com.liferay.portal.spring.transaction.TransactionInvokerImpl.invoke(TransactionInvokerImpl.java:39)
at com.liferay.portal.kernel.transaction.TransactionInvokerUtil.invoke(TransactionInvokerUtil.java:28)
at com.liferay.exportimport.internal.background.task.LayoutImportBackgroundTaskExecutor.execute(LayoutImportBackgroundTaskExecutor.java:85)
at com.liferay.portal.background.task.internal.SerialBackgroundTaskExecutor.execute(SerialBackgroundTaskExecutor.java:62)
at com.liferay.portal.kernel.backgroundtask.DelegatingBackgroundTaskExecutor.execute(DelegatingBackgroundTaskExecutor.java:41)
at com.liferay.portal.background.task.internal.ThreadLocalAwareBackgroundTaskExecutor.execute(ThreadLocalAwareBackgroundTaskExecutor.java:72)
at com.liferay.portal.background.task.internal.messaging.BackgroundTaskMessageListener.doReceive(BackgroundTaskMessageListener.java:136)
at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:26)
at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:74)
at com.liferay.portal.messaging.internal.ParallelDestination$1.run(ParallelDestination.java:56)
at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask._runTask(ThreadPoolExecutor.java:753)
at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:665)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.thoughtworks.xstream.converters.ConversionException: Failed calling method_---- Debugging information ----_message : Failed calling method_cause-exception : java.lang.NullPointerException_cause-message : null_method : com.liferay.portal.kernel.util.UnicodeProperties.readObject()_class : com.liferay.portal.kernel.util.UnicodeProperties_required-type : com.liferay.portal.kernel.util.UnicodeProperties_converter-type : com.thoughtworks.xstream.converters.reflection.SerializableConverter_path : /StagedLayoutSet/_layoutSet/_settingsProperties/map_line number : 48_class[1] : com.liferay.portal.model.impl.LayoutSetImpl_required-type[1] : com.liferay.portal.model.impl.LayoutSetImpl_converter-type[1] : com.thoughtworks.xstream.converters.reflection.ReflectionConverter_class[2] : com.liferay.layout.internal.model.adapter.StagedLayoutSetImpl_required-type[2] : com.liferay.layout.internal.model.adapter.StagedLayoutSetImpl_version : 1.4.16_------------------------------- [Sanitized]
at com.thoughtworks.xstream.core.util.SerializationMembers.callReadObject(SerializationMembers.java:136)
at com.thoughtworks.xstream.converters.reflection.SerializableConverter.doUnmarshal(SerializableConverter.java:443)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:277)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:499)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:425)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:277)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:499)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:425)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:277)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1429)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1409)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1294)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1285)
at com.liferay.exportimport.internal.lar.PortletDataContextImpl.fromXML(PortletDataContextImpl.java:713)
at com.liferay.exportimport.internal.lar.PortletDataContextImpl.lambda$getZipEntryAsObject$1(PortletDataContextImpl.java:1467)
at java.util.HashMap.computeIfAbsent(HashMap.java:1127)
at com.liferay.exportimport.internal.lar.PortletDataContextImpl.getZipEntryAsObject(PortletDataContextImpl.java:1466)
at com.liferay.exportimport.internal.lar.PortletDataContextImpl.getZipEntryAsObject(PortletDataContextImpl.java:1447)
at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil._getStagedModel(StagedModelDataHandlerUtil.java:675)
at com.liferay.exportimport.kernel.lar.StagedModelDataHandlerUtil.importStagedModel(StagedModelDataHandlerUtil.java:437)
at com.liferay.site.internal.exportimport.data.handler.StagedGroupStagedModelDataHandler.doImportStagedModel(StagedGroupStagedModelDataHandler.java:344)
at com.liferay.site.internal.exportimport.data.handler.StagedGroupStagedModelDataHandler.doImportStagedModel(StagedGroupStagedModelDataHandler.java:78)
at com.liferay.exportimport.kernel.lar.BaseStagedModelDataHandler.importStagedModel(BaseStagedModelDataHandler.java:396)
... 31 more
Caused by: java.lang.NullPointerException
at java.io.ObjectInputStream.filterCheck(ObjectInputStream.java:1246)
at java.io.ObjectInputStream.checkArray(ObjectInputStream.java:1288)
at java.io.ObjectInputStream.access$200(ObjectInputStream.java:212)
at java.io.ObjectInputStream$1.checkArray(ObjectInputStream.java:260)
at java.util.HashMap.readObject(HashMap.java:1399)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.thoughtworks.xstream.core.util.SerializationMembers.callReadObject(SerializationMembers.java:132)
... 65 more

Environment

  • Liferay DXP 7.2 + Java8u180 (or lower versions)

Resolution

  • This is a known JDK issue JDK-8203368. Update the JDK version to JDK8u181 or later versions to resolve the error.

 

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