JIRA Calendar Fails to Render with NoClassDefFoundError: com/atlassian/jira/timezone/TimeZoneManager
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
When adding the JIRA Calendar to the Dashboard, selecting Due Date, Planned Start or Planned End in the "Date to Display" dropdown and generating the Calendar will result in:
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An internal server error occurred when requesting resource http://example.com/rest/calendar-plugin/1.0/calendar/htmlcalendar.html?dateFieldName=duedate&displayVersions=true&numOfIssueIcons=10&context=gadget&portletId=10901&includeContainer=true&searchRequestId=10261.The following appears in the atlassian-jira.log:
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09-Aug-2012 16:33:19 com.sun.jersey.server.impl.application.WebApplicationImpl onException
SEVERE: Internal server error
java.lang.NoClassDefFoundError: com/atlassian/jira/timezone/TimeZoneManager
Cause
Incompatible JIRA Calendar Plugin with your version of JIRA
Resolution
Download the correct version of the JIRA Calendar Plugin from https://marketplace.atlassian.com/293
Uninstall the existing JIRA Calendar Plugin in your
JIRA Administration >> PluginsInstall the newly downloaded JIRA Calendar Plugin via
JIRA Administration >> Plugins >> Install Plugin
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