Symptoms

After upgrading JIRA Agile from version 5.7, which is bundled with JIRA 4.4, you may notice errors in the logs whenever performing standard actions in JIRA.

2011-08-30 17:32:55,566 http-9580-18 ERROR xxxx.xxxxx 1052x5584x1 1na0grc 10.0.1.132,127.0.0.1 /secure/EditComment.jspa [atlassian.event.internal.EventPublisherImpl] There was an exception thrown trying to dispatch event 'com.atlassian.jira.event.issue.IssueEvent@283dd661[issue=XXXX-7867,comment=com.atlassian.jira.issue.comments.CommentImpl@ce81e082,worklog=<null>,changelog=<null>,eventTypeId=14,sendMail=true,params={originalcomment=com.atlassian.jira.issue.comments.CommentImpl@2674a299, eventsource=action, baseurl=http://xxx.xxxxxx.com},subtasksUpdated=false]' from the invoker 'com.atlassian.event.internal.SingleParameterMethodListenerInvoker@5c7b1ff8'.
java.lang.RuntimeException: com/atlassian/jira/event/type/EventType
	at com.atlassian.event.internal.SingleParameterMethodListenerInvoker.invoke(SingleParameterMethodListenerInvoker.java:54)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$2.run(AsynchronousAbleEventDispatcher.java:60)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$1.execute(AsynchronousAbleEventDispatcher.java:28)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher.dispatch(AsynchronousAbleEventDispatcher.java:56)
	at com.atlassian.event.internal.EventPublisherImpl.invokeListeners(EventPublisherImpl.java:151)
	at com.atlassian.event.internal.EventPublisherImpl.publish(EventPublisherImpl.java:70)
        ... 

Cause

The load sequence for JIRA Agile 5.7, which is bundled with JIRA 4.4.  This means that it first loads and then unloads to load the newer GreeHopper version.  During this process, it can unload other JIRA components too.

Resolution

Disable the ranking nightly service and restart JIRA. If this is not an option, you can modify the JIRA install directory to remove the bundled GreenHopper jar.