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  1. Java Driver
  2. JAVA-2429

DBCollection.distinct() fails when a null value is in the result

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 3.4.2
    • Affects Version/s: 3.4.0
    • Component/s: Query Operations
    • None

      When I execute the command db.getCollection("collname").distinct("fieldname"); on a collection that contains a document like 

      {
  "_id": "...",
  "fieldname": null 
}

      Exception in thread "main" java.lang.IllegalArgumentException: The value for key value can not be null
	at org.bson.BsonDocument.put(BsonDocument.java:721)
	at org.bson.BsonDocument.<init>(BsonDocument.java:83)
	at com.mongodb.DBCollection$1.apply(DBCollection.java:1185)
	at com.mongodb.DBCollection$1.apply(DBCollection.java:1182)
	at com.mongodb.MappingIterable$1.apply(MappingIterable.java:53)
	at com.mongodb.OperationIterable.forEach(OperationIterable.java:73)
	at com.mongodb.MappingIterable.forEach(MappingIterable.java:50)
	at com.mongodb.MappingIterable.into(MappingIterable.java:60)
	at com.mongodb.DBCollection.distinct(DBCollection.java:1189)
	at com.mongodb.DBCollection.distinct(DBCollection.java:1161)
	at com.mongodb.DBCollection.distinct(DBCollection.java:1136)
	at com.mongodb.DBCollection.distinct(DBCollection.java:1124)
	at DbBugTest.main(DbBugTest.java:13)

            Assignee:
            jeff.yemin@mongodb.com Jeffrey Yemin
            Reporter:
            mango Jan S.
            Votes:
            0 Vote for this issue
            Watchers:
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              Created:
              Updated:
              Resolved: