decommissioned node still in gossip

[Peng Xiao]

Dear All,


We have decommisioned a DC,but from system.log,it'still gossiping
INFO  [GossipStage:1] 2017-11-01 17:21:36,310 Gossiper.java:1008 - InetAddress 
/x.x.x.x is now DOWN


Could you please advise?


Thanks,
Peng Xiao