Exception occurred: java.util.ConcurrentModificationException is raised when editing issues
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
Summary
When performing issue actions, for example, Edit Issue, an error is shown to the user:
Exception occurred: java.util.ConcurrentModificationException
Environment
Extension for Jira Service Desk app is installed
Diagnosis
You see the error message above.
Your environment matches above.
Cause
The Extension for Jira Service Desk app has a yet to be determined negative interaction with Jira. While it is enabled, in some situations the error above can occur.
Solution
Disable the app.
If the problem goes away, contact the app vendor for assistance.
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