The Perl CPAN Scalar::Util module shipped with Red Hat, and with the unsupported "EPEL" yum community repository are at different versions.
When users upgrade Perl CPAN packages, and they have different versions of the Perl CPAN Scalar::Util module, they can experience related application instabilities and failures.
Error 500 has been reported due to this, after upgrading RHEL with EPEL repos enabled.
- Red hat Enterprise Linux Version 5.9
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