That is entirely the problem. By having one node, but RF=3, you have created this exact problem.
Each node can own, at most, one copy of each row of data, so the cluster is treating this (correctly) as a degraded runtime environment where no operation requiring CL > 1 will always fail. LWT requires quorum #of nodes to be available. -Tupshin On Apr 16, 2014 5:45 AM, "Vivek Mishra" <mishra.v...@gmail.com> wrote: > Hi, > Mine is a simple case. Running on single node only. Keyspace is: > > create keyspace twitter with replication = {'class':'SimpleStrategy', > 'replication_factor' : 3} > > -Vivek > > > On Wed, Apr 16, 2014 at 1:27 AM, Tupshin Harper <tups...@tupshin.com>wrote: > >> Please provide your keyspace definition, and the output of "nodetool >> ring" >> >> -Tupshin >> On Apr 15, 2014 3:52 PM, "Vivek Mishra" <mishra.v...@gmail.com> wrote: >> >>> Hi, >>> I am trying Cassandra light weight transaction support with Cassandra >>> 2.0.4 >>> >>> cqlsh:twitter> create table user(user_id text primary key, namef text); >>> cqlsh:twitter> insert into user(user_id,namef) values('v','ff') if not >>> exists; >>> >>> *Unable to complete request: one or more nodes were unavailable.* >>> >>> Any suggestions? >>> >>> -Vivek >>> >> >