[geomesa-dev] [JIRA] (GEOMESA-2672) Stats - group-by stat doesn't handle

["Emilio Lahr-Vivaz (JIRA)" <jira@xxxxxxxxxxxxxxxxxxxxx>]

Title: Message Title

Emilio Lahr-Vivaz created an issue

GeoMesa / GEOMESA-2672

Stats - group-by stat doesn't handle null grouping values

Issue Type:	Bug
Affects Versions:	2.0.0, 2.1.0, 2.0.1, 2.0.2, 2.2.0, 2.1.1, 2.3.0, 2.1.2, 2.2.1, 2.2.2, 2.1.3
Assignee:	Unassigned
Created:	23/Jul/19 10:46 AM
Priority:	Major
Reporter:	Emilio Lahr-Vivaz

 java.lang.NullPointerException
 		at scala.Predef$.Long2long(Predef.scala:358)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer$$anonfun$writer$3.apply(StatSerializer.scala:662)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer$$anonfun$writer$3.apply(StatSerializer.scala:662)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer$$anonfun$writeGroupBy$1.apply(StatSerializer.scala:166)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer$$anonfun$writeGroupBy$1.apply(StatSerializer.scala:165)
 		at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:99)
 		at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:99)
 		at scala.collection.mutable.HashTable$class.foreachEntry(HashTable.scala:230)
 		at scala.collection.mutable.HashMap.foreachEntry(HashMap.scala:40)
 		at scala.collection.mutable.HashMap.foreach(HashMap.scala:99)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer$.writeGroupBy(StatSerializer.scala:165)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer$.org$locationtech$geomesa$utils$stats$KryoStatSerializer$$write(StatSerializer.scala:123)
 		at org.locationtech.geomesa.utils.stats.KryoStatSerializer.serialize(StatSerializer.scala:56)
 		at org.locationtech.geomesa.index.iterators.StatsScan$class.encodeResult(StatsScan.scala:48)
 		at org.locationtech.geomesa.accumulo.iterators.KryoLazyStatsIterator.encodeResult(KryoLazyStatsIterator.scala:31)
 		at org.locationtech.geomesa.accumulo.iterators.KryoLazyStatsIterator.encodeResult(KryoLazyStatsIterator.scala:31)
 		at org.locationtech.geomesa.index.iterators.AggregatingScan$class.aggregate(AggregatingScan.scala:101)
 		at org.locationtech.geomesa.accumulo.iterators.BaseAggregatingIterator.aggregate(BaseAggregatingIterator.scala:26)
 		at org.locationtech.geomesa.accumulo.iterators.BaseAggregatingIterator.findTop(BaseAggregatingIterator.scala:66)
 		at org.locationtech.geomesa.accumulo.iterators.BaseAggregatingIterator.seek(BaseAggregatingIterator.scala:52) 

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