2014-03-11 17:33:26,417 ERROR [UpmAsynchronousTaskManager:thread-2] [atlassian.event.internal.AsynchronousAbleEventDispatcher] run There was an exception thrown trying to dispatch event 'com.atlassian.plugin.event.events.PluginModuleEnabledEvent@a81fe5' from the invoker 'SingleParameterMethodListenerInvoker{method=public void com.atlassian.confluence.plugins.featurediscovery.PluginModuleEventListener.onPluginModuleEnabled(com.atlassian.plugin.event.events.PluginModuleEnabledEvent), listener=com.atlassian.confluence.plugins.featurediscovery.PluginModuleEventListener@1158ba9}'.
 -- referer: http://athena.yorkstreet.local/plugins/servlet/upm | url: /rest/plugins/1.0/ | userName: admin
java.lang.RuntimeException: java.lang.NullPointerException
	at com.atlassian.event.internal.SingleParameterMethodListenerInvoker.invoke(SingleParameterMethodListenerInvoker.java:50)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$2.run(AsynchronousAbleEventDispatcher.java:66)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$1.execute(AsynchronousAbleEventDispatcher.java:32)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher.dispatch(AsynchronousAbleEventDispatcher.java:60)
	at com.atlassian.event.internal.EventPublisherImpl.invokeListeners(EventPublisherImpl.java:160)
	at com.atlassian.event.internal.EventPublisherImpl.publish(EventPublisherImpl.java:79)
	at com.atlassian.plugin.event.impl.DefaultPluginEventManager.broadcast(DefaultPluginEventManager.java:84)
	at com.atlassian.plugin.manager.DefaultPluginManager.notifyModuleEnabled(DefaultPluginManager.java:1663)
..
Caused by: java.lang.NullPointerException
	at net.java.ao.EntityManager$CacheKey.hashCode(EntityManager.java:1227)
	at java.util.HashMap.hash(HashMap.java:351)
	at java.util.HashMap.getEntry(HashMap.java:443)
	at java.util.LinkedHashMap.get(LinkedHashMap.java:301)
	at net.java.ao.EntityManager.getFromCache(EntityManager.java:285)
	at net.java.ao.EntityManager.peer(EntityManager.java:269)

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '0' for key 'PRIMARY'
2014-02-25 16:22:43,983 ERROR [UpmAsynchronousTaskManager:thread-2] [atlassian.event.internal.AsynchronousAbleEventDispatcher] run There was an exception thrown trying to dispatch event 'com.atlassian.plugin.event.events.PluginModuleEnabledEvent@f1e16a' from the invoker 'SingleParameterMethodListenerInvoker{method=public void com.atlassian.confluence.plugins.featurediscovery.PluginModuleEventListener.onPluginModuleEnabled(com.atlassian.plugin.event.events.PluginModuleEnabledEvent), listener=com.atlassian.confluence.plugins.featurediscovery.PluginModuleEventListener@1ea12da}'.
 -- referer: http://local
host:8090/plugins/servlet/upm#manage | url: /rest/plugins/1.0/ | userName: admin
java.lang.RuntimeException: There was a SQL exception thrown by the Active Objects library:
Database:
	- name:MySQL
	- version:5.5.36-log
	- minor version:5
	- major version:5
Driver:
	- name:MySQL Connector Java
	- version:mysql-connector-java-5.1.28 ( Revision: user@oracle.com-20131125092425-yvejy3xvci77ru3k )

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '0' for key 'PRIMARY'
	at com.atlassian.event.internal.SingleParameterMethodListenerInvoker.invoke(SingleParameterMethodListenerInvoker.java:54)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$2.run(AsynchronousAbleEventDispatcher.java:66)
........