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From "Jason Altekruse (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-1787) Memory leak in kvgen function
Date Sat, 29 Nov 2014 06:24:12 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Altekruse updated DRILL-1787:
-----------------------------------
    Fix Version/s: 0.7.0

> Memory leak in kvgen function
> -----------------------------
>
>                 Key: DRILL-1787
>                 URL: https://issues.apache.org/jira/browse/DRILL-1787
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Jason Altekruse
>            Assignee: Jason Altekruse
>             Fix For: 0.7.0
>
>
> Running a kvgen on a map with large values will produce a memory leak. This is due to
improper use of the reallocIfNeeded() method on DrillBuf. This method returns a new buffer,
it does not resize the buffer within the one that is calling the method. This buffer is automatically
freed by the method itself, so a reference just needs to be saved in the same variable holding
the original buffer.
> Error message produced is standard memory leak error in Drill, pasted below.
> Query failed: Failure while running fragment., Attempted to close accountor with 6 buffer(s)
still allocatedfor QueryId: 64a39e3c-42a9-455d-aaee-0c7374492835, MajorFragmentId: 0, MinorFragmentId:
0.
> 	Total 1 allocation(s) of byte size(s): 16384, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt4Vector.allocateNewSafe(UInt4Vector.java:137)
> 		org.apache.drill.exec.vector.complex.RepeatedMapVector.allocateNewSafe(RepeatedMapVector.java:232)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:135)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 4096, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt1Vector.allocateNewSafe(UInt1Vector.java:137)
> 		org.apache.drill.exec.vector.NullableVarCharVector.allocateNewSafe(NullableVarCharVector.java:170)
> 		org.apache.drill.exec.vector.complex.impl.NullableVarCharWriterImpl.allocate(NullableVarCharWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 32768, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.VarCharVector.allocateNewSafe(VarCharVector.java:314)
> 		org.apache.drill.exec.vector.NullableVarCharVector.allocateNewSafe(NullableVarCharVector.java:169)
> 		org.apache.drill.exec.vector.complex.impl.NullableVarCharWriterImpl.allocate(NullableVarCharWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 16384, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.IntVector.allocateNewSafe(IntVector.java:137)
> 		org.apache.drill.exec.vector.NullableIntVector.allocateNewSafe(NullableIntVector.java:172)
> 		org.apache.drill.exec.vector.complex.impl.NullableIntWriterImpl.allocate(NullableIntWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 16384, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt4Vector.allocateNewSafe(UInt4Vector.java:137)
> 		org.apache.drill.exec.vector.VarCharVector.allocateNewSafe(VarCharVector.java:320)
> 		org.apache.drill.exec.vector.NullableVarCharVector.allocateNewSafe(NullableVarCharVector.java:169)
> 		org.apache.drill.exec.vector.complex.impl.NullableVarCharWriterImpl.allocate(NullableVarCharWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 4096, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt1Vector.allocateNewSafe(UInt1Vector.java:137)
> 		org.apache.drill.exec.vector.NullableIntVector.allocateNewSafe(NullableIntVector.java:173)
> 		org.apache.drill.exec.vector.complex.impl.NullableIntWriterImpl.allocate(NullableIntWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
>  [ 629bcce3-6492-4cfb-af75-2aaeb466e9d0 on n4a:31010 ]
>   (java.lang.IllegalStateException) Attempted to close accountor with 6 buffer(s) still
allocatedfor QueryId: 64a39e3c-42a9-455d-aaee-0c7374492835, MajorFragmentId: 0, MinorFragmentId:
0.
> 	Total 1 allocation(s) of byte size(s): 16384, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt4Vector.allocateNewSafe(UInt4Vector.java:137)
> 		org.apache.drill.exec.vector.complex.RepeatedMapVector.allocateNewSafe(RepeatedMapVector.java:232)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:135)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 4096, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt1Vector.allocateNewSafe(UInt1Vector.java:137)
> 		org.apache.drill.exec.vector.NullableVarCharVector.allocateNewSafe(NullableVarCharVector.java:170)
> 		org.apache.drill.exec.vector.complex.impl.NullableVarCharWriterImpl.allocate(NullableVarCharWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 32768, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.VarCharVector.allocateNewSafe(VarCharVector.java:314)
> 		org.apache.drill.exec.vector.NullableVarCharVector.allocateNewSafe(NullableVarCharVector.java:169)
> 		org.apache.drill.exec.vector.complex.impl.NullableVarCharWriterImpl.allocate(NullableVarCharWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 16384, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.IntVector.allocateNewSafe(IntVector.java:137)
> 		org.apache.drill.exec.vector.NullableIntVector.allocateNewSafe(NullableIntVector.java:172)
> 		org.apache.drill.exec.vector.complex.impl.NullableIntWriterImpl.allocate(NullableIntWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 16384, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt4Vector.allocateNewSafe(UInt4Vector.java:137)
> 		org.apache.drill.exec.vector.VarCharVector.allocateNewSafe(VarCharVector.java:320)
> 		org.apache.drill.exec.vector.NullableVarCharVector.allocateNewSafe(NullableVarCharVector.java:169)
> 		org.apache.drill.exec.vector.complex.impl.NullableVarCharWriterImpl.allocate(NullableVarCharWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)
> 	Total 1 allocation(s) of byte size(s): 4096, at stack location:
> 		org.apache.drill.exec.memory.TopLevelAllocator$ChildAllocator.buffer(TopLevelAllocator.java:212)
> 		org.apache.drill.exec.vector.UInt1Vector.allocateNewSafe(UInt1Vector.java:137)
> 		org.apache.drill.exec.vector.NullableIntVector.allocateNewSafe(NullableIntVector.java:173)
> 		org.apache.drill.exec.vector.complex.impl.NullableIntWriterImpl.allocate(NullableIntWriterImpl.java:113)
> 		org.apache.drill.exec.vector.complex.impl.RepeatedMapWriter.allocate(RepeatedMapWriter.java:137)
> 		org.apache.drill.exec.vector.complex.impl.SingleListWriter.allocate(SingleListWriter.java:116)
> 		org.apache.drill.exec.vector.complex.impl.ComplexWriterImpl.allocate(ComplexWriterImpl.java:157)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doAlloc(ProjectRecordBatch.java:217)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.doWork(ProjectRecordBatch.java:144)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:89)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:86)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:76)
> 		org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:52)
> 		org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:129)
> 		org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:106)
> 		org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:124)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:67)
> 		org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:122)
> 		org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57)
> 		org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:113)
> 		org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:249)
> 		java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 		java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 		java.lang.Thread.run(Thread.java:744)



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