[Spacewalk-list] Failed to add groups file for repository: epel7-centos7-x86_64 - comps file is empty/damaged

[Royee Tager]

When I run the yum grouplist on my CentOS 7 clients I get the following
error message:

[root at labit-lg02 ~]# yum grouplist
Loaded plugins: fastestmirror, rhnplugin
This system is receiving updates from RHN Classic or Red Hat Satellite.
Loading mirror speeds from cached hostfile
Failed to add groups file for repository: epel7-centos7-x86_64 - comps file
is empty/damaged
Available environment groups:
   Minimal Install
   Infrastructure Server
   File and Print Server
   Basic Web Server
   Virtualization Host
   Server with GUI
   GNOME Desktop
   KDE Plasma Workspaces
   Development and Creative Workstation
Installed groups:
   Legacy UNIX Compatibility
   Scientific Support
   System Administration Tools
   System Management
Available Groups:
   Compatibility Libraries
   Console Internet Tools
   Development Tools
   Graphical Administration Tools
   Security Tools
   Smart Card Support
Done
[root at labit-lg02 ~]#

The comps file on the Spacewalk server are not empty:

[root at spacewalk ~]# ls -l
/var/satellite/rhn/comps/epel7-centos7-x86_64/b2bbf938a1e7c811a67d6cfc633e4ccb487917549f960c4dd8e8ffb1f6262740-comps-epel7.xml
-rw-r--r-- 1 root root 1297635 Aug 28 23:11
/var/satellite/rhn/comps/epel7-centos7-x86_64/b2bbf938a1e7c811a67d6cfc633e4ccb487917549f960c4dd8e8ffb1f6262740-comps-epel7.xml
[root at spacewalk ~]# ls -l
/var/satellite/rhn/comps/epel7-centos7-x86_64/b2bbf938a1e7c811a67d6cfc633e4ccb487917549f960c4dd8e8ffb1f6262740-comps-epel7.xml.xz
-rw-r--r-- 1 root root 167236 Sep  5 20:02
/var/satellite/rhn/comps/epel7-centos7-x86_64/b2bbf938a1e7c811a67d6cfc633e4ccb487917549f960c4dd8e8ffb1f6262740-comps-epel7.xml.xz
[root at spacewalk ~]#

How can I solve this problem?
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