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From "Filip Grabowski (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4315) Empty JSON(Mongo) document causes "Unexpected RuntimeException"
Date Wed, 27 Jan 2016 08:37:39 GMT
Filip Grabowski created DRILL-4315:

             Summary: Empty JSON(Mongo) document causes "Unexpected RuntimeException"
                 Key: DRILL-4315
                 URL: https://issues.apache.org/jira/browse/DRILL-4315
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.4.0
         Environment: Linux
            Reporter: Filip Grabowski

An example of a JSON docuemnt:
   "code" : "IRE-cGz6TqJEeWHVwBQVgET6w", 
   "attributes" : {} 
If all "attribute" are null(as in the example above) drill produces an error as shown below:

select attributes from mongo.MASTER_WS.interactionrecord; Error: Unexpected RuntimeException:
java.lang.NullPointerException (state=,code=0) 

The same query returns values if there is at least one document for which  attribute is not
It is ugly because it make the system look unstable. 

I wanted to use the query to convert JSON into parquet and it fails the same way as with the

By the way when creating this issue version 1.4 was on the list of unreleased versions...

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