Always read the release notes carefully before upgrading!
Upgrading to bugfix releases within one supported branch (e.g. from 1.9.12-1 to 1.9.12-2) may be done by upgrading the packages with
rpm -Uvh <packageName>
Now dCache needs to be started again.
Please use The Ultimate Golden Release Upgrade Guide I to upgrade from 1.9.5 to 1.9.12.