[jira] [Created] (DRILL-6107) NullPointerException while querying MongoDB collection

["Duarte Silva (JIRA)" <ji...@apache.org>]

Duarte Silva created DRILL-6107:
-----------------------------------

             Summary: NullPointerException while querying MongoDB collection
                 Key: DRILL-6107
                 URL: https://issues.apache.org/jira/browse/DRILL-6107
             Project: Apache Drill
          Issue Type: Bug
          Components:  Server
    Affects Versions: 1.12.0, 1.11.0
         Environment: Drill specific

 
{noformat}
export DRILL_HEAP=${DRILL_HEAP:-"1G"}
export DRILL_MAX_DIRECT_MEMORY=${DRILL_MAX_DIRECT_MEMORY:-"2G"}
{noformat}
 

Other

 
{noformat}
Memory: 8 GiB
Processor: 2 VCPU (Intel i7)
Disk: 19 GiB (13 GiB free)
OS: Ubuntu 16.06
Java: OpenJDK 1.8.0_151
{noformat}
 

 
            Reporter: Duarte Silva
         Attachments: collection.bson.log, drillbit.log

I have installed Drill and configured it to connect to a MongoDB instance. That instance as a collection with a single document. When I query that collection using:
{code:sql}
select ports from mongo.ivre.hosts;{code}
It fails with a NullPointerException. I'm able to query that collection as long as I don't select the "ports" property. Looking at the exception stack trace and respective Drill code it is clear that the "map" variable isn't supposed to be "null".
{code:java}
public MapOrListWriter list(final String name) {
  assert map != null;
  return new MapOrListWriterImpl(map.list(name));
}
{code}
I couldn't figure out why it wasn't being initialized. I have attached the log and the collection BSON file. Thanks in advance.



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