Elasticsearch error: cluster_block_exception [FORBIDDEN/12/index read-only / allow delete (api)], flood stage disk watermark exceeded : <p>When trying to post documents to Elasticsearch as normal I'm getting this error:</p>

<pre><code>cluster_block_exception [FORBIDDEN/12/index read-only / allow delete (api)];
</code></pre>

<p>I also see this message on the Elasticsearch logs:</p>

<pre><code>flood stage disk watermark [95%] exceeded ... all indices on this node will marked read-only
</code></pre>
