Failed jira.home startup check leaves JIRA broken

2011-03-22 13:39:53,610 main FATAL      [atlassian.jira.startup.JiraStartupLogger] 

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The jira.home directory '/Luis/Workspace/jira43/jira-ide-support/../jirahome' is already locked. Please see http://docs.atlassian.com/jira/docs-043/How+do+I+unlock+my+JIRA+home+directory%3F?clicked=jirahelp# for more information on locked jira.home directories.
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2011-03-22 13:39:53,611 main FATAL      [atlassian.jira.startup.JiraStartupLogger] Startup check failed. JIRA will be locked.
2011-03-22 13:39:53,740 main FATAL      [atlassian.jira.upgrade.ConsistencyLauncher] Not initializing JIRA, the startup checklist failed and JIRA has been locked.
2011-03-22 13:39:53,740 main FATAL      [atlassian.jira.upgrade.UpgradeLauncher] Skipping, JIRA is locked.
22/03/2011 1:39:53 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class com.atlassian.jira.startup.LauncherContextListener
java.lang.NullPointerException
	at com.atlassian.jira.ComponentManager.getComponentInstanceOfType(ComponentManager.java:499)
	at com.atlassian.jira.upgrade.PluginUpgradeLauncher.getPluginEventManager(PluginUpgradeLauncher.java:39)
	at com.atlassian.jira.upgrade.PluginUpgradeLauncher.start(PluginUpgradeLauncher.java:28)
	at com.atlassian.jira.startup.DefaultJiraLauncher.start(DefaultJiraLauncher.java:41)
	at com.atlassian.jira.startup.LauncherContextListener$1.create(LauncherContextListener.java:50)
	at com.atlassian.jira.startup.LauncherContextListener$1.create(LauncherContextListener.java:45)
	at com.atlassian.multitenant.impl.MultiTenantComponentMapImpl.get(MultiTenantComponentMapImpl.java:121)
	at com.atlassian.multitenant.impl.MultiTenantComponentMapImpl.onTenantStart(MultiTenantComponentMapImpl.java:165)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager$1.consume(DefaultMultiTenantManager.java:134)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager$1.consume(DefaultMultiTenantManager.java:131)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForEachListener(DefaultMultiTenantManager.java:256)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager.startTenant(DefaultMultiTenantManager.java:130)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager.startAll(DefaultMultiTenantManager.java:203)
	at com.atlassian.jira.startup.LauncherContextListener.contextInitialized(LauncherContextListener.java:77)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4429)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:516)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
	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:597)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
22/03/2011 1:39:53 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
java.lang.NullPointerException
	at com.atlassian.jira.ComponentManager.getComponentInstanceOfType(ComponentManager.java:499)
	at com.atlassian.jira.upgrade.PluginUpgradeLauncher.getPluginEventManager(PluginUpgradeLauncher.java:39)
	at com.atlassian.jira.upgrade.PluginUpgradeLauncher.start(PluginUpgradeLauncher.java:28)
	at com.atlassian.jira.startup.DefaultJiraLauncher.start(DefaultJiraLauncher.java:41)
	at com.atlassian.jira.startup.LauncherContextListener$1.create(LauncherContextListener.java:50)
	at com.atlassian.jira.startup.LauncherContextListener$1.create(LauncherContextListener.java:45)
	at com.atlassian.multitenant.impl.MultiTenantComponentMapImpl.get(MultiTenantComponentMapImpl.java:121)
	at com.atlassian.multitenant.impl.MultiTenantComponentMapImpl.onTenantStart(MultiTenantComponentMapImpl.java:165)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager$1.consume(DefaultMultiTenantManager.java:134)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager$1.consume(DefaultMultiTenantManager.java:131)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForEachListener(DefaultMultiTenantManager.java:256)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager.startTenant(DefaultMultiTenantManager.java:130)
	at com.atlassian.multitenant.impl.DefaultMultiTenantManager.startAll(DefaultMultiTenantManager.java:203)
	at com.atlassian.jira.startup.LauncherContextListener.contextInitialized(LauncherContextListener.java:77)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4429)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:516)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
	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:597)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)