RSS Macro Fails with an IllegalArgumentException (Username may not be null)
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
RSS macro does not work in Confluence and shows this error: java.lang.IllegalArgumentException: Username may not be null, even though the RSS feed does not require a username and password.
Cause
The JVM parameter -Dhttp.auth.ntlm.domain=YourDomain is being used.
Resolution
Remove the JVM parameter from your JVM setting. Please note that NTLM proxies are supported in version 2.10 or later. See Configuring Web Proxy Support for Confluence.
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