Team Calendars throw error 500 right after an upgrade to Confluence version 7

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Platform Notice: Server and Data Center Only - This article only applies to Atlassian products on the server and data center platforms.


After upgrading Confluence from 6.x to 7.x, Team Calendar stops working and throws an error 500 on the banner:

The following appears in the atlassian-confluence.log

2021-05-16 00:00:00,000 ERROR [https-jsse-nio-8443-exec-42 url:/rest/calendar-...tching/status.json username:user1] [common.error.jersey.ThrowableExceptionMapper] toResponse Uncaught exception thrown by REST service: 'com.atlassian.confluence.mail.notification.Notification com.atlassian.confluence.mail.notification.NotificationManager.getNotificationByUserAndPage(com.atlassian.user.User, com.atlassian.confluence.pages.AbstractPage)'
 -- referer: https://confluence/display/TEST/Test+Page | url: /rest/calendar-services/1.0/calendar/subcalendars/watching/status.json | traceId: 030d1147135daad4 | userName: user1
java.lang.NoSuchMethodError: 'com.atlassian.confluence.mail.notification.Notification com.atlassian.confluence.mail.notification.NotificationManager.getNotificationByUserAndPage(com.atlassian.user.User, com.atlassian.confluence.pages.AbstractPage)'
	at com.atlassian.confluence.extra.calendar3.DefaultCalendarManager.isWatchingViaContent(
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)



  • Confluence version 7.x or above

  • Team Calendar version 6.02x


The current Team Calendar version is not compatible with the newly upgraded Confluence version. 


According to Team Calendars Version History, TC 6.0.2x is compatible with Confluence Server 5.10.7 - 6.14.3. After upgrading Confluence to 7.x, you'll have to update the Team Calendar app to a compatible version (6.0.47+).

  1. Log in to Confluence as a System Administrator
  2. Go to Manage Apps
  3. Locate the Team Calendar app
  4. Upgrade to the latest compatible version by clicking on the "Upgrade" button

Last modified on May 31, 2021

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