> Dataload fails when sort column is given, and query returns null value from another session
> -------------------------------------------------------------------------------------------
>
> Key: CARBONDATA-2953
> URL:
https://issues.apache.org/jira/browse/CARBONDATA-2953> Project: CarbonData
> Issue Type: Bug
> Reporter: Akash R Nilugal
> Assignee: Akash R Nilugal
> Priority: Minor
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> # when dataload is done with sort columns, it fails with following exeptions
> java.lang.ClassCastException: java.lang.Integer cannot be cast to [B
> at org.apache.carbondata.processing.sort.sortdata.IntermediateSortTempRowComparator.compare(IntermediateSortTempRowComparator.java:71)
> at org.apache.carbondata.processing.loading.sort.unsafe.holder.UnsafeInmemoryHolder.compareTo(UnsafeInmemoryHolder.java:71)
> at org.apache.carbondata.processing.loading.sort.unsafe.holder.UnsafeInmemoryHolder.compareTo(UnsafeInmemoryHolder.java:26)
> at java.util.PriorityQueue.siftUpComparable(PriorityQueue.java:656)
> at java.util.PriorityQueue.siftUp(PriorityQueue.java:647)
> at java.util.PriorityQueue.offer(PriorityQueue.java:344)
> at java.util.PriorityQueue.add(PriorityQueue.java:321)
> at org.apache.carbondata.processing.loading.sort.unsafe.merger.UnsafeSingleThreadFinalSortFilesMerger.startSorting(UnsafeSingleThreadFinalSortFilesMerger.java:129)
> at org.apache.carbondata.processing.loading.sort.unsafe.merger.UnsafeSingleThreadFinalSortFilesMerger.startFinalMerge(UnsafeSingleThreadFinalSortFilesMerger.java:94)
> at org.apache.carbondata.processing.loading.sort.impl.UnsafeParallelReadMergeSorterImpl.sort(UnsafeParallelReadMergeSorterImpl.java:110)
> at org.apache.carbondata.processing.loading.steps.SortProcessorStepImpl.execute(SortProcessorStepImpl.java:55)
> at org.apache.carbondata.processing.loading.steps.DataWriterProcessorStepImpl.execute(DataWriterProcessorStepImpl.java:112)
> at org.apache.carbondata.processing.loading.DataLoadExecutor.execute(DataLoadExecutor.java:51)
> at org.apache.carbondata.spark.rdd.NewCarbonDataLoadRDD$$anon$1.<init>(NewCarbonDataLoadRDD.scala:212)
> at org.apache.carbondata.spark.rdd.NewCarbonDataLoadRDD.internalCompute(NewCarbonDataLoadRDD.scala:188)
> at org.apache.carbondata.spark.rdd.CarbonRDD.compute(CarbonRDD.scala:78)
> at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:324)
> # when two sessions are running in parallel, the follow below steps in session1
> ## drop table
> ## create table
> ## load data to table
> # follow below step in session2
> ## query on table(select * from table limit 1), then the query returns null result instead for proper result
Locked
