jihoonson opened a new issue #9131: NPE while reading a list containing nulls in Orc files URL: https://github.com/apache/druid/issues/9131 ### Affected Version master and 0.17.0 branches ### Description `OrcStructConverter.convertPrimitive()` assumes `field` is not null, but `convertList()` passes null. Here is a stack trace. ``` 2020-01-06T05:30:09,717 ERROR [task-runner-0-priority-0] org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner - Exception while running task[AbstractTask{id='single_phase_sub_task_s3-orc_odngeokb_2020-01-06T05:29:59.197Z', groupId='index_parallel_s3-orc_dbhjmago_2020-01-06T05:29:50.303Z', taskResource=TaskResource{availabilityGroup='single_phase_sub_task_s3-orc_odngeokb_2020-01-06T05:29:59.197Z', requiredCapacity=1}, dataSource='s3-orc', context={forceTimeChunkLock=true}}] java.lang.NullPointerException: null at org.apache.druid.data.input.orc.OrcStructConverter.convertPrimitive(OrcStructConverter.java:110) ~[?:?] at org.apache.druid.data.input.orc.OrcStructConverter.lambda$convertList$0(OrcStructConverter.java:61) ~[?:?] at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_212] at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) ~[?:1.8.0_212] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[?:1.8.0_212] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[?:1.8.0_212] at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_212] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_212] at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[?:1.8.0_212] at org.apache.druid.data.input.orc.OrcStructConverter.convertList(OrcStructConverter.java:62) ~[?:?] at org.apache.druid.data.input.orc.OrcStructConverter.convertField(OrcStructConverter.java:213) ~[?:?] at org.apache.druid.data.input.orc.OrcStructConverter.convertRootField(OrcStructConverter.java:172) ~[?:?] at org.apache.druid.data.input.orc.OrcStructFlattenerMaker.getRootField(OrcStructFlattenerMaker.java:74) ~[?:?] at org.apache.druid.data.input.orc.OrcStructFlattenerMaker.getRootField(OrcStructFlattenerMaker.java:39) ~[?:?] at org.apache.druid.java.util.common.parsers.ObjectFlatteners$1$1.get(ObjectFlatteners.java:118) ~[druid-core-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at java.util.Collections$UnmodifiableMap.get(Collections.java:1454) ~[?:1.8.0_212] at org.apache.druid.data.input.MapBasedRow.getRaw(MapBasedRow.java:87) ~[druid-core-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.segment.incremental.IncrementalIndex.toIncrementalIndexRow(IncrementalIndex.java:672) ~[druid-processing-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.segment.incremental.IncrementalIndex.add(IncrementalIndex.java:606) ~[druid-processing-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.segment.realtime.plumber.Sink.add(Sink.java:210) ~[druid-server-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.segment.realtime.appenderator.AppenderatorImpl.add(AppenderatorImpl.java:259) ~[druid-server-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.segment.realtime.appenderator.BaseAppenderatorDriver.append(BaseAppenderatorDriver.java:408) ~[druid-server-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.segment.realtime.appenderator.BatchAppenderatorDriver.add(BatchAppenderatorDriver.java:113) ~[druid-server-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.indexing.common.task.batch.parallel.SinglePhaseSubTask.generateAndPushSegments(SinglePhaseSubTask.java:476) ~[druid-indexing-service-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.indexing.common.task.batch.parallel.SinglePhaseSubTask.runTask(SinglePhaseSubTask.java:225) ~[druid-indexing-service-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.indexing.common.task.AbstractBatchIndexTask.run(AbstractBatchIndexTask.java:138) ~[druid-indexing-service-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:419) [druid-indexing-service-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:391) [druid-indexing-service-0.17.0-SNAPSHOT.jar:0.17.0-SNAPSHOT] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_212] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_212] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212] ```
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