I'm on Umbraco version 7.5.14 and having an issue with my Umbraco Examine folders getting out of sync. Depending on what azure instance you get, you get different content. This is from the "arraffinity" cookie from Azure.

Here are my indexers:

      <add name="InternalIndexer" type="UmbracoExamine.UmbracoContentIndexer, UmbracoExamine"
       supportUnpublished="true"
       supportProtected="true"
       analyzer="Lucene.Net.Analysis.WhitespaceAnalyzer, Lucene.Net" directoryFactory="Examine.LuceneEngine.Directories.SyncTempEnvDirectoryFactory,Examine" />

  <add name="InternalMemberIndexer" type="UmbracoExamine.UmbracoMemberIndexer, UmbracoExamine"
       supportUnpublished="true"
       supportProtected="true"
       analyzer="Lucene.Net.Analysis.Standard.StandardAnalyzer, Lucene.Net" directoryFactory="Examine.LuceneEngine.Directories.SyncTempEnvDirectoryFactory,Examine" />

  <!-- default external indexer, which excludes protected and unpublished pages-->
  <add name="ExternalIndexer" type="UmbracoExamine.UmbracoContentIndexer, UmbracoExamine" directoryFactory="Examine.LuceneEngine.Directories.SyncTempEnvDirectoryFactory,Examine" />

  <add name="ArticleIndexer"
        type="UmbracoExamine.UmbracoContentIndexer, UmbracoExamine"
        analyzer="Lucene.Net.Analysis.Standard.StandardAnalyzer, Lucene.Net"
        directoryFactory="Examine.LuceneEngine.Directories.SyncTempEnvDirectoryFactory,Examine"
       />

I am including a {machinename} in the IndexSet's (without this I get weird Examine errors with the Lucene index's being in use when another server tries to access the same one)

My app_data Examine folder ends up with lots of random server name folders: