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Reading a batch of values is not supported for multi-value BlockValSet
java.lang.UnsupportedOperationException: Reading a batch of values is not supported for multi-value BlockValSet	at com.linkedin.pinot.core.operator.docvalsets.MultiValueSet.readIntValues(MultiValueSet.java:47)	at com.linkedin.pinot.core.common.DataFetcher.fetchSingleDictIds(DataFetcher.java:106)	at com.linkedin.pinot.core.operator.aggregation.SingleValueBlockCache.getDictIdArrayForColumn(SingleValueBlockCache.java:91)	at com.linkedin.pinot.core.operator.aggregation.SingleValueBlockCache.getDoubleValueArrayForColumn(SingleValueBlockCache.java:110)	at com.linkedin.pinot.core.operator.aggregation.groupby.DefaultGroupByExecutor.aggregateColumn(DefaultGroupByExecutor.java:182)	at com.linkedin.pinot.core.operator.aggregation.groupby.DefaultGroupByExecutor.process(DefaultGroupByExecutor.java:133)	at com.linkedin.pinot.core.operator.aggregation.groupby.AggregationGroupByOperator.processBlock(AggregationGroupByOperator.java:129)	at com.linkedin.pinot.core.operator.aggregation.groupby.AggregationGroupByOperator.getNextBlock(AggregationGroupByOperator.java:98)	at com.linkedin.pinot.core.operator.aggregation.groupby.AggregationGroupByOperator.getNextBlock(AggregationGroupByOperator.java:80)	at com.linkedin.pinot.core.operator.BaseOperator.nextBlock(BaseOperator.java:36)	at com.linkedin.pinot.core.operator.MCombineGroupByOperator$1.runJob(MCombineGroupByOperator.java:175)	at com.linkedin.pinot.core.util.trace.TraceRunnable.run(TraceRunnable.java:53)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)