title: AppFabric Cache errors
body: <p>The AppFabric Cache in our production crashes almost every day, and is highly unstable. The below errors are logged:</p>
  
  <blockquote>
    <p>Microsoft.ApplicationServer.Caching.DataCacheException:
    ErrorCode:SubStatus:There is a temporary failure. Please retry later.
    (Sufficient secondaries not present or they are in throttled state.)</p>
    
    <p>Microsoft.ApplicationServer.Caching.DataCacheException:
    ErrorCode:SubStatus:There is a temporary failure. Please retry later.
    (The request did not find the primary.)</p>
    
    <p>AppFabric Caching service crashed.{Lease with external store expired:
    Microsoft.Fabric.Federation.ExternalRingStateStoreException: Lease
    already expired  at
    Microsoft.Fabric.Data.ExternalStoreAuthority.UpdateNode(NodeInfo
    nodeInfo, TimeSpan timeout) at
    Microsoft.Fabric.Federation.SiteNode.PerformExternalRingStateStoreOperations(Boolean&amp;
    canFormRing, Boolean isInsert, Boolean isJoining)}</p>
  </blockquote>
  
  <p>Could someone please provide me some inputs?
  This is a HA enabled cache environment with 3 cache hosts. All of them are running on Windows Server 2008 Enterprise Edition, and the SQL Server is used for config.</p>