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java.lang.NullPointerException: 	at$3.transform(	at$3.transform(	at	at$5.hasNext(	at	at	at	at io.druid.segment.incremental.SpatialDimensionRowTransformer.(	at io.druid.segment.incremental.IncrementalIndex.(	at io.druid.segment.incremental.OnheapIncrementalIndex.(	at io.druid.segment.incremental.OnheapIncrementalIndex.(	at io.druid.indexer.IndexGeneratorJob.makeIncrementalIndex(	at io.druid.indexer.IndexGeneratorJob.access$000(	at io.druid.indexer.IndexGeneratorJob$IndexGeneratorReducer.reduce(	at io.druid.indexer.IndexGeneratorJob$IndexGeneratorReducer.reduce(	at	at org.apache.hadoop.mapred.ReduceTask.runNewReducer(	at	at org.apache.hadoop.mapred.LocalJobRunner$Job$	at java.util.concurrent.Executors$	at	at java.util.concurrent.ThreadPoolExecutor.runWorker(	at java.util.concurrent.ThreadPoolExecutor$	at