Hi Kunal, Did you edit the cassandra.yaml file in each data center to remove the seed nodes? On which ever data center is starting from scratch (I think it's B in your case), you may want to also change the cluster name.
Best, *Marc Selwan | *DataStax *| *PM, Server Team *|* *(925) 413-7079* *|* Twitter <https://twitter.com/MarcSelwan> * Quick links | *DataStax <http://www.datastax.com> *| *Training <http://www.academy.datastax.com> *| *Documentation <http://www.datastax.com/documentation/getting_started/doc/getting_started/gettingStartedIntro_r.html> *| *Downloads <http://www.datastax.com/download> On Mon, Apr 22, 2019 at 3:38 PM Kunal <kunal.v...@gmail.com> wrote: > Hi Friends, > > I need small help in unpairing two datacenters. > We have 2 datacenters (say A and B ) with 3 nodes in each datacenter. We > want to remove one whole data center (B) (3 nodes) from the other one (B). > basically, want to unpair both datacenter and want to use them both > individually. > We are trying this using nodetool decommission and it is removing the 3 > nodes from B datacenter. But when we are trying to bring up datacenter B to > use it separately from Datacenter A, it is joining back to datacenter A. We > noticed in debug.log, nodes from datacenter A keeps looking for nodes in > datacenter B and getting connection refused error when the nodes of > datacenter B are down, but as soon as nodes comes back, they are joining to > the cluster. > We don't want nodes from datacenter B to join datacenter A once they are > decommissioned. > > Can you please let me know if i am missing anything. > > Thanks in advance. > > Regards, > Kunal Vaid >
