RHEL/CentOS Avoiding breakage due to yaml-cpp-0.5.3

[Avi Kivity]

Recently, the yaml-cpp package for RHEL 7 / CentOS 7 was updated to
version 0.5.3. This update breaks ScyllaDB. Ubuntu and Debian users may
ignore this email.


You can query the currently installed yaml-cpp version by running the
following command:


    rpm -q yaml-cpp


If you have not yet updated to yaml-cpp-0.5.3, and wish to update your
system, make sure to add "--exclude=yaml-cpp" to the yum command line to
prevent it from being updated:


   yum --exclude=yaml-cpp update


If you have already updated to yaml-cpp-0.5.3, scylla will fail the next
time you restart it. You can downgrade to yaml-cpp-0.5.1, a known good
version, with:


    yum downgrade
https://kojipkgs.fedoraproject.org//packages/yaml-cpp/0.5.1/6.el7/x86_64/yaml-cpp-0.5.1-6.el7.x86_64.rpm


We will shortly release updates to Scylla that allow it to work with
yaml-cpp-0.5.3.

[Avi Kivity]

Thanks to the Fedora EPEL maintainers, a fix is on the way.


To expedite the fix reaching the stable repository, please help by
testing the packages at
https://koji.fedoraproject.org/koji/buildinfo?buildID=1021664. You can
do that with the command


    yum install
https://kojipkgs.fedoraproject.org//packages/yaml-cpp/0.5.1/1.el7.1/x86_64/yaml-cpp-0.5.1-1.el7.1.x86_64.rpm


Once you've verified that it works for you (i.e. Scylla boots
correctly), please provide feedback on this page:


https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2018-adb6af896b


when sufficient positive feedback is recorded, the package makes its way
into the stable repository.