2014-05-02 12:28:46,220 INFO [localhost-startStop-1] [com.atlassian.confluence.lifecycle] contextInitialized Starting Confluence 5.5 [build 5501 based on commit hash a39771cd4bb7ab00a226a7ea8d6dd65e64226a7f]
2014-05-02 12:28:48,451 WARN [localhost-startStop-1] [atlassian.config.xml.AbstractDom4jXmlConfigurationPersister] saveDocumentAtomically Unable to move C:\Program Files\Atlassian\Application Data\Confluence\confluence.cfg.xml1232542810330726807tmp to C:\Program Files\Atlassian\Application Data\Confluence\confluence.cfg.xml. Falling back to non-atomic overwrite.
2014-05-02 12:28:48,482 INFO [localhost-startStop-1] [springframework.web.context.ContextLoader] initWebApplicationContext Root WebApplicationContext: initialization started
2014-05-02 12:28:51,711 INFO [localhost-startStop-1] [com.atlassian.confluence.lifecycle] <init> Loading EhCache cache manager
2014-05-02 12:29:01,524 WARN [localhost-startStop-1] [org.springframework.beans.TypeConverterDelegate] findDefaultEditor PropertyEditor [com.sun.beans.editors.EnumEditor] found through deprecated global PropertyEditorManager fallback - consider using a more isolated form of registration, e.g. on the BeanWrapper/BeanFactory!
2014-05-02 12:29:08,575 INFO [localhost-startStop-1] [springframework.web.context.ContextLoader] initWebApplicationContext Root WebApplicationContext: initialization completed in 20093 ms
2014-05-02 12:29:08,668 INFO [localhost-startStop-1] [confluence.upgrade.impl.DefaultUpgradeManager] beforeUpgrade Generating pre-upgrade recovery file...
2014-05-02 12:29:08,699 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] begin []
2014-05-02 12:29:08,699 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] begin DATABASE_INFORMATION: []
2014-05-02 12:29:08,715 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] end DATABASE_INFORMATION: []
...
...
...
 2014-05-02 12:29:10,961 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] end TABLE_DATA: [os_user_group]
2014-05-02 12:29:10,961 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] begin TABLE_DATA: [pagetemplates]
2014-05-02 12:29:10,961 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] end TABLE_DATA: [pagetemplates]
2014-05-02 12:29:10,961 INFO [localhost-startStop-1] [confluence.upgrade.recovery.ConfluenceProgressMonitor] begin TABLE_DATA: [plugindata]
2014-05-02 12:35:55,099 INFO [localhost-startStop-1] [com.atlassian.confluence.lifecycle] contextInitialized Starting Confluence 5.5 [build 5501 based on commit hash a39771cd4bb7ab00a226a7ea8d6dd65e64226a7f]   

SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
...
Caused by: java.lang.OutOfMemoryError: Java heap space
...
	at com.atlassian.dbexporter.node.stax.StaxStreamWriter$1.setContentAsBinary(StaxStreamWriter.java:131)
...
	at com.atlassian.dbexporter.DbExporter.exportData(DbExporter.java:53)
	at com.atlassian.confluence.upgrade.recovery.DefaultRecoveryFileGenerator.generate(DefaultRecoveryFileGenerator.java:76)
	at com.atlassian.confluence.upgrade.impl.DefaultUpgradeManager.beforeUpgrade(DefaultUpgradeManager.java:237)
	at com.atlassian.confluence.upgrade.AbstractUpgradeManager.upgrade(AbstractUpgradeManager.java:134)