Gossip shows - all nodes are up. But when we perform writes , coordinator stores the hints. It means - coordinator was not able to deliver the writes to few nodes after meeting consistency requirements.
The nodes for which writes were failing, are in different DC. Those nodes do not have any load. Gossips shows everything is up. I already set write timeout to 60 sec, but no help. Can anyone encounter this scenario ? Network side everything is fine. Cassandra version is 2.1.13 -- *Regards,* *Anshu *