Just a word of warning.

This is the second time I've seen 1 server beeing stuck rebuilding
deployment packages in a two server environment when upgrading to
There must be some bug in the 10.2.2 to 10.3 upgrade that trashes the
\install\download files.
I've seen it on both Linux and Windows.

Solution: Copy the files in "\install\download" from the finished
server to the stuck server and reboot.

It cannot be stressed enough times: Always do a ZDC check before
upgrading ZCM.