Unable to Access Confluence Questions or Team Calendars

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Problem

When trying to access Confluence Questions or Team Calendars, the following error appears:

The following appears in the atlassian-confluence.log:

ERROR [AtlassianEvent::CustomizableThreadFactory-1] [atlassian.event.internal.AsynchronousAbleEventDispatcher] run There was an exception thrown trying to dispatch event 'com.atlassian.confluence.plugins.questions.internal.lifecycle.ActiveObjectsController$AsyncEvent@2bde5b5d' from the invoker 'SingleParameterMethodListenerInvoker{method=public void com.atlassian.confluence.plugins.questions.internal.lifecycle.ActiveObjectsController.onActiveObjectsModuleEnabled(com.atlassian.confluence.plugins.questions.internal.lifecycle.ActiveObjectsController$AsyncEvent), listener=com.atlassian.confluence.plugins.questions.internal.lifecycle.ActiveObjectsController@1009551e}'.
java.lang.RuntimeException: Active Objects failed to initalize for bundle com.atlassian.confluence.plugins.confluence-questions
	at com.atlassian.event.internal.SingleParameterMethodListenerInvoker.invoke(SingleParameterMethodListenerInvoker.java:54)
	at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$2.run(AsynchronousAbleEventDispatcher.java:66)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: com.atlassian.activeobjects.internal.ActiveObjectsInitException: Active Objects failed to initalize for bundle com.atlassian.confluence.plugins.confluence-questions
	at com.atlassian.activeobjects.osgi.ActiveObjectsServiceFactory$5.apply(ActiveObjectsServiceFactory.java:207)
	at com.atlassian.activeobjects.osgi.ActiveObjectsServiceFactory$5.apply(ActiveObjectsServiceFactory.java:187)
	at com.atlassian.util.concurrent.Promises$Of$2.apply(Promises.java:259)
	at com.atlassian.util.concurrent.Promises$Of$2.apply(Promises.java:256)
	at com.atlassian.util.concurrent.Promises$2.onFailure(Promises.java:162)
	at com.google.common.util.concurrent.Futures$7.run(Futures.java:1074)
	at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:253)
	at com.google.common.util.concurrent.ExecutionList$RunnableExecutorPair.execute(ExecutionList.java:161)
	at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:146)
	at com.google.common.util.concurrent.JdkFutureAdapters$ListenableFutureAdapter$1.run(JdkFutureAdapters.java:151)
	... 3 more
Caused by: java.lang.RuntimeException: Unknown dialect.

Cause

This error appears when the database is using a non-standard dialect and Confluence Questions or Team Calendars are looking for a specific one.

The dialects used by Confluence as of 5.6.1 are:

"net.sf.hibernate.dialect.PostgreSQLDialect",
"com.atlassian.hibernate.dialect.MySQLDialect",
"net.sf.hibernate.dialect.SQLServerIntlDialect",
"net.sf.hibernate.dialect.OracleIntlDialect"


Resolution

  1. Shut down Confluence
  2. Navigate to the home directory
    1. (The <confluence_home> directory is the path defined in the following file: <confluence_install>/confluence/WEB-INF/classes/confluence-init.properties)
  3. Modify the confluence.cfg.xml file
    1. There is a line that begins

      <property name="hibernate.dialect">

      We will need to update the property associated with it.

      The value used depends on the database in use. Please refer to the listed dialects in the 'Cause' section. In the following example, we'll use MySQL.

      If you're using an older version of Confluence, the dialect may be different. If in doubt, please contact Atlassian Support.

    2. Please confirm that the property reads

      	net.sf.hibernate.dialect.MySQLDialect
    3. If so, please change the property to

      com.atlassian.hibernate.dialect.MySQLDialect
    4. The entire line should now look like this:

      <property name="hibernate.dialect">com.atlassian.hibernate.dialect.MySQLDialect</property>
  4. Save the file

  5. Start Confluence and check if questions is working correctly

Last modified on May 15, 2017

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