Open Build service build blocked saying "downloading 1 dod packages"


How to understand & debug the blocked packages on OBS?

Couple of my packages are in blocked state in my private OBS. In UI it just show

downloading 1 dod packages

And in my /srv/obs/log/scheduler_x86_64.log, it shows below error

response from RPC dodfetch/ (http://my.obs.instance:5352/build/
404 remote error: remote error remote error http // remote error Not Found

requesting 1 dod packages from