title: Cassandra error: "Cannot achieve consistency level LOCAL_ONE" during user creation
body: <p>I am using 3 node cassandra 2.1.14 and using authenticator: PasswordAuthenticator. </p>
  
  <p>But when trying to create a user by logging in as cassandra/cassandra. Is there something i need got fix in the set up?</p>
  
  <blockquote>
    <p>cassandra@cqlsh> create user test with password 'test' superuser;</p>
  </blockquote>
  
  <p>ServerError: 
  
  <blockquote>
    <p>message="java.lang.RuntimeException:
    org.apache.cassandra.exceptions.UnavailableException: Cannot achieve
    consistency level LOCAL_ONE"></p>
  </blockquote>
  
  <p>The system log shows:</p>
  
  <blockquote>
    <p>ERROR [SharedPool-Worker-1] 2016-06-27 07:17:36,538
    ErrorMessage.java:251 - Unexpected exception during request
    java.lang.RuntimeException:
    org.apache.cassandra.exceptions.UnavailableException: Cannot achieve
    consistency level LOCAL_ONE
            at org.apache.cassandra.auth.Auth.selectUser(Auth.java:276) ~[apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.auth.Auth.isExistingUser(Auth.java:86) ~[apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.cql3.statements.CreateUserStatement.validate(CreateUserStatement.java:55) ~[apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:236)
    ~[apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:260)
    ~[apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.transport.messages.QueryMessage.execute(QueryMessage.java:122)
    ~[apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439)
    [apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335)
    [apache-cassandra-2.1.14.jar:2.1.14]
            at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
    [netty-all-4.0.23.Final.jar:4.0.23.Final]
            at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
    [netty-all-4.0.23.Final.jar:4.0.23.Final]
            at io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32)
    [netty-all-4.0.23.Final.jar:4.0.23.Final]
            at io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324)
    [netty-all-4.0.23.Final.jar:4.0.23.Final]
            at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    [na:1.8.0_77]
            at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
    [apache-cassandra-2.1.14.jar:2.1.14]
            at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
    [apache-cassandra-2.1.14.jar:2.1.14]
            at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77]</p>
  </blockquote>