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java.nio.BufferUnderflowException: 	at java.nio.Buffer.nextGetIndex(Buffer.java:506)	at java.nio.DirectByteBuffer.getShort(DirectByteBuffer.java:590)	at io.druid.query.aggregation.hyperloglog.HyperLogLogCollector.fold(HyperLogLogCollector.java:393)	at io.druid.query.aggregation.hyperloglog.HyperUniquesBufferAggregator.aggregate(HyperUniquesBufferAggregator.java:65)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:237)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.updateValues(GroupByQueryEngine.java:200)	at io.druid.query.groupby.GroupByQueryEngine$RowUpdater.access$100(GroupByQueryEngine.java:150)	at io.druid.query.groupby.GroupByQueryEngine$RowIterator.next(GroupByQueryEngine.java:378)	at io.druid.query.groupby.GroupByQueryEngine$RowIterator.next(GroupByQueryEngine.java:293)	at com.metamx.common.guava.BaseSequence.accumulate(BaseSequence.java:67)	at com.metamx.common.guava.ConcatSequence$1.accumulate(ConcatSequence.java:46)	at com.metamx.common.guava.ConcatSequence$1.accumulate(ConcatSequence.java:42)	at com.metamx.common.guava.MappingAccumulator.accumulate(MappingAccumulator.java:39)	at com.metamx.common.guava.FilteringAccumulator.accumulate(FilteringAccumulator.java:40)	at com.metamx.common.guava.MappingAccumulator.accumulate(MappingAccumulator.java:39)	at com.metamx.common.guava.BaseSequence.accumulate(BaseSequence.java:67)	at com.metamx.common.guava.MappedSequence.accumulate(MappedSequence.java:40)	at com.metamx.common.guava.ResourceClosingSequence.accumulate(ResourceClosingSequence.java:38)	at com.metamx.common.guava.FilteredSequence.accumulate(FilteredSequence.java:42)	at com.metamx.common.guava.MappedSequence.accumulate(MappedSequence.java:40)	at com.metamx.common.guava.ResourceClosingSequence.accumulate(ResourceClosingSequence.java:38)	at com.metamx.common.guava.ConcatSequence.accumulate(ConcatSequence.java:40)	at com.metamx.common.guava.ResourceClosingSequence.accumulate(ResourceClosingSequence.java:38)	at io.druid.query.MetricsEmittingQueryRunner$1.accumulate(MetricsEmittingQueryRunner.java:104)	at com.metamx.common.guava.MappedSequence.accumulate(MappedSequence.java:40)	at com.metamx.common.guava.Sequences$1.accumulate(Sequences.java:90)	at com.metamx.common.guava.Sequences.toList(Sequences.java:113)	at io.druid.query.BySegmentQueryRunner.run(BySegmentQueryRunner.java:56)	at io.druid.query.MetricsEmittingQueryRunner$1.accumulate(MetricsEmittingQueryRunner.java:104)	at io.druid.query.spec.SpecificSegmentQueryRunner$2$1.call(SpecificSegmentQueryRunner.java:87)	at io.druid.query.spec.SpecificSegmentQueryRunner.doNamed(SpecificSegmentQueryRunner.java:171)	at io.druid.query.spec.SpecificSegmentQueryRunner.access$400(SpecificSegmentQueryRunner.java:41)	at io.druid.query.spec.SpecificSegmentQueryRunner$2.doItNamed(SpecificSegmentQueryRunner.java:162)	at io.druid.query.spec.SpecificSegmentQueryRunner$2.accumulate(SpecificSegmentQueryRunner.java:80)	at io.druid.query.CPUTimeMetricQueryRunner$1.accumulate(CPUTimeMetricQueryRunner.java:81)	at com.metamx.common.guava.Sequences$1.accumulate(Sequences.java:90)	at io.druid.query.GroupByMergedQueryRunner$1$1.call(GroupByMergedQueryRunner.java:118)	at io.druid.query.GroupByMergedQueryRunner$1$1.call(GroupByMergedQueryRunner.java:111)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at io.druid.query.PrioritizedListenableFutureTask.run(PrioritizedExecutorService.java:271)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)