Sorry, the fact that this was Linux was not clear, but, I should have known this by this path
/var/opt/omni/server/db80/logfiles/rlog/obrindex.dat
This is apparently a known problem, and a test binary was released earlier this week. Open a case with the response center, make reference to QCIM2A50676
To get ahead of this, please run the following command on your cell manager
omniofflr -idb -autorecover -save /tmp/restjob.txt -skiprestore
This will produce a file /tmp/restjob.txt. When you open the case, be prepared to provide this file and the 'obrindex.dat' file (see path above), and make sure that you identify what version of DP you are running