Unable to add more users to Project Role in JIRA
Platform Notice: Data Center - This article applies to Atlassian products on the Data Center platform.
Note that this knowledge base article was created for the Data Center version of the product. Data Center knowledge base articles 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
- Unable to add more than a certain number of users to any project role
- Running JIRA behind a Proxy, eg. IIS
- This is the error being returned when attempting to add more users to Project Role: "The JIRA server was contacted but has returned an error response. We are unsure of the result of this operation"
Cause
Every time a new user is added to a project, that username is also added to the url. The problem is the request url is longer than the max allowed query string configured for IIS.
Resolution
Increase the maximum query string for IIS from 2048 (default) to 4096 bytes.
Please note that Proxy configuration is outside the scope of Atlassian Support Offerings.