title: ElasticSearch Can't open file to read checksums
body: <p>ElasticSearch ran out of disk space on a couple nodes and this is the resulting error</p>
  
  <p>The error we're getting is:</p>
  
  <pre><code> [WARN][indices.store   ] [odr-es-md15] Can't open file to read checksums
   java.io.FileNotFoundException: No such file [_2rlb_es090_0.pos]
  at org.elasticsearch.index.store.DistributorDirectory.getDirectory(DistributorDirectory.java:176)
  at org.elasticsearch.index.store.DistributorDirectory.getDirectory(DistributorDirectory.java:144)
  at org.elasticsearch.index.store.Store$MetadataSnapshot.buildMetadata(Store.java:482)
  at org.elasticsearch.index.store.Store$MetadataSnapshot.&lt;init&gt;(Store.java:456)
  at org.elasticsearch.index.store.Store.readMetadataSnapshot(Store.java:281)
  ...
  ...
  ...
  </code></pre>