Exporting a space that contains a page level permission can throw an exception like this one: CONFLUENCE System Error A system error has occurred - our apologies! Please contact your Confluence administrator to create a support issue on our support system at http://support.atlassian.com with the following information: 1. a description of your problem and what you were doing at the time it occurred 2. cut & paste the error and system information found below 3. attach the application server log file (if possible). We will respond as promptly as possible. Thank you! Cause: com.atlassian.confluence.importexport.ImportExportException: Couldn't backup database data. at com.atlassian.confluence.importexport.impl.AbstractXmlExporter.backupEntities(AbstractXmlExporter.java:181) caused by: java.lang.NullPointerException at com.atlassian.confluence.security.ContentPermission.hashCode(ContentPermission.java:257) Stack Trace: [hide] com.atlassian.confluence.importexport.ImportExportException: Couldn't backup database data. at com.atlassian.confluence.importexport.impl.AbstractXmlExporter.backupEntities(AbstractXmlExporter.java:181) at com.atlassian.confluence.importexport.impl.AbstractXmlExporter.backupEverything(AbstractXmlExporter.java:85) at com.atlassian.confluence.importexport.impl.FileXmlExporter.backupEverything(FileXmlExporter.java:73) at com.atlassian.confluence.importexport.impl.AbstractXmlExporter.doExport(AbstractXmlExporter.java:78) at com.atlassian.confluence.importexport.impl.FileXmlExporter.doExport(FileXmlExporter.java:40) at com.atlassian.confluence.importexport.impl.XmlExporter.doExport(XmlExporter.java:24) at com.atlassian.confluence.importexport.DefaultImportExportManager.exportAs(DefaultImportExportManager.java:111) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:284) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174) at $Proxy49.exportAs(Unknown Source) at com.atlassian.confluence.importexport.actions.ExportSpaceAction.execute(ExportSpaceAction.java:111) at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168) at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.intercept(DefaultWorkflowInterceptor.java:55) at com.atlassian.confluence.core.ConfluenceWorkflowInterceptor.intercept(ConfluenceWorkflowInterceptor.java:39)