Filip Grabowski created DRILL-4315:
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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 null.
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 select.
By the way when creating this issue version 1.4 was on the list of unreleased
versions...
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