to identity if this is known issue with nexus-3.89.1-02 version
I will need to confirm what’s the exception, the current logging level set doesn’t give us enough information. could you please set the logging level for this class to DEBUG?
Steps
Go to settings → Support → Logging → create logger button
inside the form fill the logger name as org.sonatype.nexus.repository.yum.datastore.internal.createrepo.YumHostedMetadataFacet and set the logging level to DEBUG.
Run the rebuild metadata task again it should show the exception stack trace