title: TransportError(403, u'cluster_block_exception', u'blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];')
body: <p>When I try to store anything in elasticsearch, An error says that:</p>
  
  <pre><code>TransportError(403, u'cluster_block_exception', u'blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];')
  </code></pre>
  
  <p>I already inserted about 200 millions documents in my index. But I don't have an idea why this error is happening.
  I've tried:</p>
  
  <pre><code>curl -u elastic:changeme -XPUT 'localhost:9200/_cluster/settings' -H 'Content-Type: application/json' -d '{"persistent":{"cluster.blocks.read_only":false}}'
  </code></pre>
  
  <p>As mentioned here:
  <a href="https://stackoverflow.com/questions/38735514/elasticsearch-entered-read-only-mode-node-cannot-be-altered">ElasticSearch entered &quot;read only&quot; mode, node cannot be altered</a></p>
  
  <p>And the results is:</p>
  
  <pre><code>{"acknowledged":true,"persistent":{"cluster":{"blocks":{"read_only":"false"}}},"transient":{}}
  </code></pre>
  
  <p>But nothing changed. what should I do?</p>