Cannot start sprint when user profile language set to German running AdoptOpenJDK 11.0.11+9

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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.

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Summary

Starting a sprint when the user profile language is in German causes an error or date format mismatch.

  • Global language: English

  • Indexing language: German

  • User profile language: German

  • Java : AdoptOpenJDK 11.0.11+9

Environment

Jira Software

Diagnosis

When Jira's global language is set to English and a user selects Germans as their personal language. This combination can block the user from starting a sprint if Jira is running using (AdoptOpenJDK 11.0.11+9)

Cause

Starting from version 9 OpenJDK started using CLDR Standard to represent patterns and formats which can cause mismatching issues with Jira's date/time patterns.

Solution

Since OpenJDK left a way to use the legacy settings, update Jira's startup configuration, using setEnvivroment script, and enable legacy locale provider

-Djava.locale.providers=COMPAT
Updated on April 21, 2026

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