title: elasticsearch = cannot allocate because allocation is not permitted to any of the nodes
body: <p>I have elasticsearch as a single node cluster.<br />
  One of the indexes is yellow with the explanation below.<br />
  I have read all the material here and in general, I did not find a solution for this problem.
  here is the index info:<br />
  <code>yellow open research-pdl    8_TrwZieRM6oBes8sGBUWg 1 1 416656058  0  77.9gb  77.9gb</code></p>
  <p>this command <code>POST _cluster/reroute?retry_failed</code> does not seems to be doing anything.</p>
  <p>the setup is running on docker, I have 650GB free space.</p>
  <pre><code>{
    &quot;index&quot; : &quot;research-pdl&quot;,
    &quot;shard&quot; : 0,
    &quot;primary&quot; : false,
    &quot;current_state&quot; : &quot;unassigned&quot;,
    &quot;unassigned_info&quot; : {
      &quot;reason&quot; : &quot;CLUSTER_RECOVERED&quot;,
      &quot;at&quot; : &quot;2020-12-16T05:21:19.977Z&quot;,
      &quot;last_allocation_status&quot; : &quot;no_attempt&quot;
    },
    &quot;can_allocate&quot; : &quot;no&quot;,
    &quot;allocate_explanation&quot; : &quot;cannot allocate because allocation is not permitted to any of the nodes&quot;,
    &quot;node_allocation_decisions&quot; : [
      {
        &quot;node_id&quot; : &quot;5zzXP2kCQ9eDI0U6WY4j9Q&quot;,
        &quot;node_name&quot; : &quot;37f65704d9bb&quot;,
        &quot;transport_address&quot; : &quot;172.19.0.2:9300&quot;,
        &quot;node_attributes&quot; : {
          &quot;ml.machine_memory&quot; : &quot;67555622912&quot;,
          &quot;xpack.installed&quot; : &quot;true&quot;,
          &quot;transform.node&quot; : &quot;true&quot;,
          &quot;ml.max_open_jobs&quot; : &quot;20&quot;
        },
        &quot;node_decision&quot; : &quot;no&quot;,
        &quot;deciders&quot; : [
          {
            &quot;decider&quot; : &quot;same_shard&quot;,
            &quot;decision&quot; : &quot;NO&quot;,
            &quot;explanation&quot; : &quot;a copy of this shard is already allocated to this node [[research-pdl][0], node[5zzXP2kCQ9eDI0U6WY4j9Q], [P], s[STARTED], a[id=J7IX30jBSP2jXl5-IGp0BQ]]&quot;
          }
        ]
      }
    ]
  }
  
  </code></pre>
  <p>Thanks</p>