The software described in this documentation is either no longer supported or is in extended support.
Oracle recommends that you upgrade to a current supported release.

1.4.12 Spacewalk Does Not Work if root Has a Restrictive umask

If the root user's umask is too restrictive (for example, 0077 or similar instead of 0022), Apache, Tomcat, and Java processes cannot read some files written during Spacewalk installation or written by commands such as spacewalk-repo-sync or spacecmd. Clients might also stop working because Spacewalk cannot serve yum metadata or package files.