jihoonson opened a new issue #7621: NPE when both populateResultLevelCache and grandTotal are set URL: https://github.com/apache/incubator-druid/issues/7621 ### Affected Version All versions since 0.13.0 ### Description The grandTotal doesn't have timestamp and it is filled with null in the result set. If `populateResultLevelCache` is set, the below code is executed and `input.getTimestamp().getMillis()` throws NPE. ```java @Override public Function<Result<TimeseriesResultValue>, Object> prepareForCache(boolean isResultLevelCache) { return input -> { TimeseriesResultValue results = input.getValue(); final List<Object> retVal = Lists.newArrayListWithCapacity(1 + aggs.size()); retVal.add(input.getTimestamp().getMillis()); for (AggregatorFactory agg : aggs) { retVal.add(results.getMetric(agg.getName())); } if (isResultLevelCache) { for (PostAggregator postAgg : query.getPostAggregatorSpecs()) { retVal.add(results.getMetric(postAgg.getName())); } } return retVal; }; } ```
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