title: BlobTrigger in Azure WebJobs does not get triggered on files added after the WebJob is started
body: <p>When running the BlobOperations sample from the azure-webjobs-sdk-samples (1.0.0-rc1)
   (<a href="https://github.com/Azure/azure-webjobs-sdk-samples/tree/master/BasicSamples/BlobOperations" rel="nofollow">https://github.com/Azure/azure-webjobs-sdk-samples/tree/master/BasicSamples/BlobOperations</a>) I have the following problem.</p>
  
  <p>The BlobTriggers run fine when the WebJob is started:</p>
  
  <pre><code>Job host started
  Executing: 'Functions.BlobNameFromQueueMessage' because New queue message 
      detected on 'persons'.
  Executing: 'Functions.BlobToBlob' because New blob detected: 
      input/BlobOperations.txt
  Executing: 'Functions.BlobTrigger' because New blob detected: 
      output/BlobOperations.txt
  </code></pre>
  
  <p>But <strong>when I add new files to the "input" (or "output") containers nothing happens</strong>, even after waiting for more than 10 minutes.</p>
  
  <p>When I restart the WebJob, the files I uploaded <strong>do</strong> get picked up by the BlobTrigger!</p>
  
  <p>This is the (unchanged) BlobTrigger from the samples:</p>
  
  <pre><code>public static void BlobToBlob([BlobTrigger("input/{name}")] TextReader input, 
      [Blob("output/{name}")] out string output)
  {
      output = input.ReadToEnd();
  }
  </code></pre>
  
  <p>The samples are using the latest version of the Azure Webjobs SDK:</p>
  
  <pre><code>&lt;packages&gt;
    &lt;package id="Microsoft.Azure.WebJobs" version="1.0.0-rc1" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.Azure.WebJobs.Core" version="1.0.0-rc1" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.Data.Edm" version="5.6.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.Data.OData" version="5.6.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.Data.Services.Client" version="5.6.0" targetFramework="net45" /&gt;
    &lt;package id="Microsoft.WindowsAzure.ConfigurationManager" version="1.8.0.0" targetFramework="net45" /&gt;
    &lt;package id="Newtonsoft.Json" version="6.0.4" targetFramework="net45" /&gt;
    &lt;package id="System.Spatial" version="5.6.0" targetFramework="net45" /&gt;
    &lt;package id="WindowsAzure.Storage" version="4.0.1" targetFramework="net45" /&gt;
  &lt;/packages&gt;
  </code></pre>
  
  <p>I have not changed the code of the samples, except for the location of the packages (mine are in a shared location - D:\Development\Nuget.Packages) and the AzureWebJobsDashboard and AzureWebJobsStorage connection strings.</p>
  
  <p>I have the same problem in a 'real' project that is about to go into Production.</p>
  
  <p>Is this a bug, or am I doing something wrong?</p>