title: Table created with sqlContext.createExternalTable is not visible after restart of spark
body: <p>I am creating hive external table using the following statement 
            <code>sqlContext.createExternalTable(tableName, "parquet", someDF.schema, Map("path" -&gt; path))</code> 
  After restart of spark, the table created is not visible. 
  Is it possible somehow to create a hive table persisted in tachyon using spark with existing schema from some data frame ? 
  I would like the table schema to be preserved in hive metastore. Is it possible ? </p>
  
  <p>With best regards,
  Michael</p>