Hi fellow Umbracians! this is my first post so bear with me :)

I have a problem with my internal and external index, 1 - 2 times a month the indexes becomes corrupt and this error message shows in the logs:

 2016-12-23 10:28:00,653 [P3380/D6/T91] ERROR UmbracoExamine.DataServices.UmbracoLogService - Provider=InternalIndexer, NodeId=-1
System.Exception: App is shutting down so index batch operation is ignored,, IndexSet: InternalIndexSet

My application rebuilds two other indexes that stores est. 100,000 articles each every night and they work properly.

The Internal and External indexes stores est. 20-50 sets.

I´m running the application in Azure webapps.

My indexes:

<IndexSet SetName="InternalMemberIndexSet" IndexPath="~/App_Data/TEMP/ExamineIndexes/InternalMember/">
    <IndexAttributeFields>
      <add Name="id" />
      <add Name="nodeName"/>
      <add Name="updateDate" />
      <add Name="writerName" />
      <add Name="loginName" />
      <add Name="email" />
      <add Name="nodeTypeAlias" />
    </IndexAttributeFields>
  </IndexSet>

  <IndexSet SetName="ExternalIndexSet" IndexPath="~/App_Data/TEMP/ExamineIndexes/External/">
    <ExcludeNodeTypes>
      <add Name="containerPage" />
      <add Name="searchPage" />
    </ExcludeNodeTypes>
  </IndexSet>

IndexProviders:

<add name="InternalIndexer" type="UmbracoExamine.UmbracoContentIndexer, UmbracoExamine"
           supportUnpublished="true"
           supportProtected="true"
           analyzer="Lucene.Net.Analysis.WhitespaceAnalyzer, Lucene.Net"
           useTempStorage="Sync"
           tempStorageDirectory="UmbracoExamine.LocalStorage.AzureLocalStorageDirectory, UmbracoExamine"/>

    <add name="ExternalIndexer" type="UmbracoExamine.UmbracoContentIndexer, UmbracoExamine"
         useTempStorage="Sync"
         tempStorageDirectory="UmbracoExamine.LocalStorage.AzureLocalStorageDirectory, UmbracoExamine"/>

IndexSearchProviders:

  <add name="ExternalSearcher" type="UmbracoExamine.UmbracoExamineSearcher, UmbracoExamine" 
       useTempStorage="Sync"
       tempStorageDirectory="UmbracoExamine.LocalStorage.AzureLocalStorageDirectory, UmbracoExamine"/>

I will send a big hug to any who helps me crack this case ;)

Cheers /Nick