title: Geoserver can't create reader for geotiff
body: <p>Geoserver 2.15 running in open shift from image oscarfonts/geoserver  with <code>GEOSERVER_DATA_DIR</code> mounted in a volume R/W doesn't create a geotiff reader (storage).</p>
  
  <p>Trying to create a storage from a geotiff located on the mount volume gives the following error:</p>
  
  <pre><code>Could not list layers for this store, an error occurred retrieving them: 
  Failed to create reader from file:TEST.tif
  
  Hints: 
  EXECUTOR_SERVICE = java.util.concurrent.ThreadPoolExecutor@23734df8[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0] 
  REPOSITORY = org.geoserver.catalog.CatalogRepository@78e50081 
  
  System defaults: 
  FORCE_AXIS_ORDER_HONORING = http 
  FORCE_LONGITUDE_FIRST_AXIS_ORDER = true 
  FEATURE_FACTORY = org.geotools.feature.LenientFeatureFactoryImpl@3dec5ca6 
  STYLE_FACTORY = StyleFactoryImpl 
  LENIENT_DATUM_SHIFT = true 
  COMPARISON_TOLERANCE = 1.0E-8 
  GRID_COVERAGE_FACTORY = GridCoverageFactory 
  TILE_ENCODING = null 
  FILTER_FACTORY = FilterFactoryImpl
  </code></pre>
  
  <p>Tried with different tiff files and the error doesn't change, but creating a storage from a shapefile it works without any problems.</p>
  
  <p>Any suggestions on how to debug the problem or what maybe causing it ?</p>
  
  <p>Thank you</p>