Team Calendars for Confluence not linking to users due incorrect timezone settings
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
If you try to mention a user in a Team Calendars for Confluence event for example, it won't find the user and it'll show the following message in confluence logs:
1
2012-10-02 10:09:50,913 WARN [http-8090-1] [confluence.extra.calendar3.DefaultJodaIcal4jTimeZoneMapper] getTimeZoneIdsSupportedByJodaAndIcal4j Time zone IDs not supported (59): [HST, EET, GMT0, Etc/GMT+7, Etc/GMT+6, CST6CDT, UTC, Etc/GMT+5, Etc/GMT+4, EST5EDT, Etc/GMT+3, Zulu, Etc/GMT+2, MST, Etc/GMT+1, Etc/GMT+0, Etc/GMT, Universal, Asia/Katmandu, WET, EST, Etc/Greenwich, GMT-0, Etc/UTC, ECT, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11, Etc/GMT-10, PST8PDT, MST7MDT, Etc/GMT-1, GMT, Etc/GMT-0, Etc/GMT+11, Etc/GMT+12, Etc/GMT-5, Etc/GMT+10, Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT+8, Etc/GMT+9, Greenwich, UCT, Etc/UCT, MET, CET, Etc/Universal, Etc/Zulu, AST, GMT+0, Etc/GMT0, SystemV/EST5EDT]
Cause
This is caused because
the timezone is not correctly set
Java which detects the default system timezone incorrectly
an ICS imported calendar specifying an invalid TZID
This other KB is related to the same error in timezone but a different message: 'The datetime zone id is not recognised' Error Appears Due to System Timezone
Resolution
Set system property -Duser.timezone=YourTimeZone. See Configuring System Properties for details.
After making the change, restart Confluence
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