title: mongo: Why I can't see collections?
body: <p>I used mongo shell and i can't see my collection even if it exists:</p>
  
  <pre><code>&gt; db.first.insert({name:'test',value:10})
  &gt; db.first.insert({name:'test2',value:20})
  
  &gt; db.first.find()
  { "_id" : ObjectId("588122a970e3439f3e3964ad"), "name" : "test", "value" : 10 }
  { "_id" : ObjectId("588122b170e3439f3e3964ae"), "name" : "test2", "value" : 20 }
  &gt; show collections  
  ########## Here is no results !!!! ############
  &gt; db.first.drop()  
  true
  &gt; db.first.drop()
  false
  </code></pre>
  
  <p>Any suggestions ?</p>
  
  <p>Regards, Olaf </p>
  
  <p>mongod --version</p>
  
  <p>db version v3.4.1</p>
  
  <p>build environment:
      distmod: debian81
      distarch: x86_64
      target_arch: x86_64</p>