I set up 4 nodes cassandra cluster in one DC, which worked fine yesterday. Today I decided to set it up as a multiple-DC cluster, and made a bunch of changes in cassandra.yaml. Now things get worse.
1. I run 'service dse start' to start cassandra, however after a few seconds, the cassandra java process exits with no error stack.
2. I don't know if my old configuration is still cached or kept in certain ways, what's the best way to clean things up, and give it a fresh start?