Chapter 14. Resolving common problems in RHUI 4

The following table lists known issues with Red Hat Update Infrastructure. If you encounter any of these issues, report the problem through Bugzilla.

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Table 14.1. Common problems in Red Hat Update Infrastructure
Event	Description of known issue	Recommendation
Installation and Configuration	You experience communication issues between the RHUA and the CDSs.	Verify the fully qualified domain name (FQDN) is set for the RHUA and CDS and is resolvable. Configure the HTTP proxy properly.
Synchronization	You cannot synchronize repositories with Red Hat.	Verify the RHUI SKUs are in your account. Verify the proper content certificates are loaded to the RHUA. Look for temporary CDN issues. Look for any HTTP proxy in your environment.
Red Hat Update Appliance/Content Delivery Network Communication	The Red Hat Update Appliance is not communicating with the Content Delivery Network.	Use the content certificate in `/etc/pki/rhui/redhat` (the `.pem` file) to test connectivity and access between the RHUA and the CDN. `wget -O - --certificate /etc/pki/rhui/redhat/* --ca-certificate /etc/rhsm/ca/redhat-uep.pem https://cdn.redhat.com/content/dist/rhel8/8/x86_64/baseos/os/repodata/repomd.xml`