title: Getting error "Cannot achieve consistency level ONE" while trying to insert record in DSE Cassandra
body: <p>I am using DSE Cassandra and want to use solr_query so created the Keyspace as follows:</p>
  
  <pre><code>create keyspace demo with replication = {'class': 'NetworkTopologyStrategy', 'Solr': 3};
  </code></pre>
  
  <p>Created the following table:</p>
  
  <pre><code>create table demo.onlinetransactions 
  ( unique_tran_id text, user_id text, account_type text, 
  account_id text, create_ts timestamp, data text, 
  primary key (unique_tran_id) );
  </code></pre>
  
  <p>However when I try to insert record in this table I am getting error as mentioned below:</p>
  
  <pre><code>insert into demo.onlinetransactions (unique_tran_id, user_id, 
  account_type, account_id, create_ts, data) 
  values ('trans1', 'user1', 'creditcard', 
  '1234567890123451', '2015-01-01 09:00:00', '{amount:100.00,vendor:Amazon}');
  </code></pre>
  
  <p><strong>Error:</strong></p>
  
  <pre><code>NoHostAvailable: ('Unable to complete the operation against any hosts',
  {&lt;Host: 127.0.0.1 dc0&gt;: Unavailable('Error from server: code=1000
  [Unavailable exception] 
  message="Cannot achieve consistency level ONE" 
  info={\'required_replicas\': 1, \'alive_replicas\': 0, 
        \'consistency\': \'ONE\'}',)})
  </code></pre>
  
  <p><strong>What configuration settings do I need to verify for me to be able to insert records in the keyspace with "NetworkTopologyStrategy" and "Solr" setting?</strong></p>
  
  <p>Also I am able to insert records when the keyspace as follows (however this is not using Solr which I want to use.): </p>
  
  <pre><code>CREATE KEYSPACE user WITH replication = 
  {'class': 'SimpleStrategy', 'replication_factor': '3'}  
  AND durable_writes = true;
  </code></pre>