Stack trace in logs at the time of startup

2011-06-10 11:05:20,642 QuartzWorker-1 ERROR ServiceRunner    Backup Service [jira.bc.dataimport.DefaultExportService] Error exporting Active Objects. java.runtime.version: 1.6.0_13-b03
java.lang.NoSuchMethodError: javax.xml.stream.XMLOutputFactory.newFactory(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljavax/xml/stream/XMLOutputFactory;
	at com.atlassian.dbexporter.node.stax.StaxUtils.newXmlOutputFactory(StaxUtils.java:189)
	at com.atlassian.dbexporter.node.stax.StaxUtils.newXmlOutputFactory(StaxUtils.java:172)
	at com.atlassian.dbexporter.node.stax.StaxStreamWriter.createXmlStreamWriter(StaxStreamWriter.java:53)
	at com.atlassian.dbexporter.node.stax.StaxStreamWriter.<init>(StaxStreamWriter.java:39)
	at com.atlassian.activeobjects.backup.ActiveObjectsBackup.save(ActiveObjectsBackup.java:105)
	at com.atlassian.jira.bc.dataimport.DefaultExportService.export(DefaultExportService.java:91)
	at com.atlassian.jira.bc.dataimport.DefaultExportService.export(DefaultExportService.java:53)
	at com.atlassian.jira.service.services.export.ExportService.performBackup(ExportService.java:136)
	at com.atlassian.jira.service.services.export.ExportService.run(ExportService.java:121)
	at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:60)
	at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:47)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
	at com.atlassian.multitenant.quartz.MultiTenantThreadPool$MultiTenantRunnable.run(MultiTenantThreadPool.java:72)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
2011-06-10 11:05:20,657 QuartzWorker-1 INFO ServiceRunner    Backup Service [jira.bc.dataimport.DefaultExportService] Finished saving the Active Objects Backup
2011-06-10 11:06:06,688 Modification Check:thread-1 INFO anonymous 658x41x1 1eo6p1w 0:0:0:0:0:0:0:1 /secure/SetupDatabase.jspa [atlassian.jira.startup.JiraStartupLogger] 

___ Modifications ___________________________

     Modified Files                                : None
     Removed Files                                 : None