nickeylawrence opened a new issue #10154:
URL: https://github.com/apache/druid/issues/10154
Hi,
I am encountering a NullPointerException from the CompactionTask. Can anyone
please suggest a solution?
To brief on the scenario, I added a new metric with aggregator type
'doubleSum' and loaded data to Druid. Later on, the aggregator had to be
changed to 'doubleMax', and more data was loaded.
Now, the compaction task is failing with the error:
_""2020-07-08T09:49:19,241 WARN [task-runner-0-priority-0]
org.apache.druid.query.aggregation.AggregatorFactory - failed to merge
aggregator factories
" org.apache.druid.query.aggregation.AggregatorFactoryNotMergeableException:
can't merge [max_XX :
org.apache.druid.query.aggregation.DoubleMaxAggregatorFactory] and [max_XX :
org.apache.druid.query.aggregation.DoubleSumAggregatorFactory] , with detailed
info [DoubleMaxAggregatorFactory{fieldName='max_XX', expression='null',
name='max_XX'}] and [DoubleSumAggregatorFactory{fieldName='max_XX',
expression='null', name='max_XX'}]
at
org.apache.druid.query.aggregation.SimpleDoubleAggregatorFactory.getMergingFactory(SimpleDoubleAggregatorFactory.java:183)
~[druid-processing-0.18.1.jar:0.18.1]
at
org.apache.druid.query.aggregation.AggregatorFactory.mergeAggregators(AggregatorFactory.java:299)
[druid-processing-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.createMetricsSpec(CompactionTask.java:688)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.createDataSchema(CompactionTask.java:667)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.createIngestionSchema(CompactionTask.java:531)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.runTask(CompactionTask.java:374)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.AbstractBatchIndexTask.run(AbstractBatchIndexTask.java:123)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:421)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:393)
[druid-indexing-service-0.18.1.jar:0.18.1]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[?:1.8.0_252]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_252]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_252]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
"2020-07-08T09:49:19,246 ERROR [task-runner-0-priority-0]
org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner - Exception while
running task[AbstractTask{id='compact_XXX-07-08T09:49:13.044Z',
groupId='compact_XXX-07-08T09:49:13.044Z',
taskResource=TaskResource{availabilityGroup='compact_XXX-07-08T09:49:13.044Z',
requiredCapacity=1}, dataSource='DataSource_XX',
context={storeCompactionState=true, priority=25, forceTimeChunkLock=true}}]
" java.lang.NullPointerException: null
at
org.apache.druid.query.aggregation.AggregatorFactory.mergeAggregators(AggregatorFactory.java:294)
~[druid-processing-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.createMetricsSpec(CompactionTask.java:688)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.createDataSchema(CompactionTask.java:667)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.createIngestionSchema(CompactionTask.java:531)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.CompactionTask.runTask(CompactionTask.java:374)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.common.task.AbstractBatchIndexTask.run(AbstractBatchIndexTask.java:123)
~[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:421)
[druid-indexing-service-0.18.1.jar:0.18.1]
at
org.apache.druid.indexing.overlord.SingleTaskBackgroundRunner$SingleTaskBackgroundRunnerCallable.call(SingleTaskBackgroundRunner.java:393)
[druid-indexing-service-0.18.1.jar:0.18.1]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[?:1.8.0_252]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_252]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_252]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
"2020-07-08T09:49:19,250 INFO [task-runner-0-priority-0]
org.apache.druid.indexing.worker.executor.ExecutorLifecycle - Task completed
with status: {
"id" : "compact_XXX-07-08T09:49:13.044Z",
"status" : "FAILED",
"duration" : 1432,
"errorMsg" : "java.lang.NullPointerException",
"location" : {
"host" : null,
"port" : -1,
"tlsPort" : -1
}_
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