title: Indexer failed to process blob due to missing content type, but the blob has a content type
body: <p>I set up blob indexing and full-text searching for Azure as described in this article: <a href="https://azure.microsoft.com/en-us/documentation/articles/search-howto-indexing-azure-blob-storage/" rel="nofollow">Indexing Documents in Azure Blob Storage with Azure Search</a>.</p>
  
  <p>Some of my pdf's, however, fail in the indexer:</p>
  
  <pre><code>[
      {
          "key": null,
          "errorMessage": "Error processing blob 'https://my-storage.blob.core.windows.net/my-container/mydocument.pdf' with content type '': 422"
      }
  ]
  </code></pre>
  
  <p>I double-checked the properties on the blob to make sure its content type was set:</p>
  
  <pre><code>{
      "container": "my-container",
      "name": "mydocument.pdf",
      "metadata": {},
      "lastModified": "Fri, 08 Jul 2016 19:43:15 GMT",
      "etag": "0xXXXXXXXXXXXXXXX",
      "blobType": "BlockBlob",
      "contentLength": "3863790",
      "requestId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
      "contentSettings": {
          "contentType": "application/pdf",
          "contentMD5": "xxxxxxxxxxxxxxxxxxxxxx=="
      },
      "lease": {
          "status": "unlocked",
          "state": "available"
      }
  }
  </code></pre>
  
  <p>Now, this particular pdf has some security restrictions (no printing), so I thought that might affect it. I created some pdf's from scratch to test it out, and they worked just fine, both with and without the restrictions.</p>