Nathan Butler created DRILL-5470:
------------------------------------
Summary: External Sort - Unable to Allocate Buffer error
Key: DRILL-5470
URL: https://issues.apache.org/jira/browse/DRILL-5470
Project: Apache Drill
Issue Type: Bug
Components: Server
Affects Versions: 1.10.0
Environment: - ubuntu 14.04
- r3.8xl (32 CPU/240GB Mem)
- openjdk version "1.8.0_111"
- drill 1.10.0 with 8656c83b00f8ab09fb6817e4e9943b2211772541 cherry-picked
Reporter: Nathan Butler
Per the mailing list discussion and Rahul's and Paul's suggestion I'm filing
this Jira issue. Drill seems to be running out of memory when doing an External
Sort. Per Zelaine's suggestion I enabled sort.external.disable_managed in
drill-override.conf and in the sqlline session. This caused the query to run
for longer but it still would fail with the same message.
Per Paul's suggestion, I enabled debug logging for the
org.apache.drill.exec.physical.impl.xsort.managed package and re-ran the query.
Here's the initial DEBUG line for ExternalSortBatch for our query:
bq. 2017-05-03 12:02:56,095 [26f600f1-17b3-d649-51be-2ca0c9bf7606:frag:2:15]
DEBUG o.a.d.e.p.i.x.m.ExternalSortBatch - Config: memory limit = 10737418240,
spill file size = 268435456, spill batch size = 8388608, merge limit =
2147483647, merge batch size = 16777216
And here's the last DEBUG line before the stack trace:
bq. 2017-05-03 12:37:44,249 [26f600f1-17b3-d649-51be-2ca0c9bf7606:frag:2:4]
DEBUG o.a.d.e.p.i.x.m.ExternalSortBatch - Available memory: 10737418240, buffer
memory = 10719535268, merge memory = 1070714
0978
And the stacktrace:
{quote}
2017-05-03 12:38:02,927 [26f600f1-17b3-d649-51be-2ca0c9bf7606:frag:2:6] INFO
o.a.d.e.p.i.x.m.ExternalSortBatch - User Error Occurred: External Sort
encountered an error while spilling to disk (Un
able to allocate buffer of size 268435456 due to memory limit. Current
allocation: 10579849472)
org.apache.drill.common.exceptions.UserException: RESOURCE ERROR: External Sort
encountered an error while spilling to disk
[Error Id: 5d53c677-0cd9-4c01-a664-c02089670a1c ]
at
org.apache.drill.common.exceptions.UserException$Builder.build(UserException.java:544)
~[drill-common-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.doMergeAndSpill(ExternalSortBatch.java:1447)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.mergeAndSpill(ExternalSortBatch.java:1376)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.spillFromMemory(ExternalSortBatch.java:1339)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.processBatch(ExternalSortBatch.java:831)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.loadBatch(ExternalSortBatch.java:618)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.load(ExternalSortBatch.java:660)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.innerNext(ExternalSortBatch.java:559)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:119)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:109)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.aggregate.StreamingAggBatch.innerNext(StreamingAggBatch.java:137)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:104)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.partitionsender.PartitionSenderRootExec.innerNext(PartitionSenderRootExec.java:144)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:94)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:232)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:226)
[drill-java-exec-1.10.0.jar:1.10.0]
at java.security.AccessController.doPrivileged(Native Method)
[na:1.8.0_111]
at javax.security.auth.Subject.doAs(Subject.java:422) [na:1.8.0_111]
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
[hadoop-common-2.7.1.jar:na]
at
org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:226)
[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38)
[drill-common-1.10.0.jar:1.10.0]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[na:1.8.0_111]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[na:1.8.0_111]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_111]
Caused by: org.apache.drill.exec.exception.OutOfMemoryException: Unable to
allocate buffer of size 268435456 due to memory limit. Current allocation:
10579849472
at
org.apache.drill.exec.memory.BaseAllocator.buffer(BaseAllocator.java:220)
~[drill-memory-base-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.memory.BaseAllocator.buffer(BaseAllocator.java:195)
~[drill-memory-base-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.vector.VarCharVector.reAlloc(VarCharVector.java:425)
~[vector-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.vector.VarCharVector.copyFromSafe(VarCharVector.java:278)
~[vector-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.vector.NullableVarCharVector.copyFromSafe(NullableVarCharVector.java:379)
~[vector-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.test.generated.PriorityQueueCopierGen140.doCopy(PriorityQueueCopierTemplate.java:22)
~[na:na]
at
org.apache.drill.exec.test.generated.PriorityQueueCopierGen140.next(PriorityQueueCopierTemplate.java:76)
~[na:na]
at
org.apache.drill.exec.physical.impl.xsort.managed.CopierHolder$BatchMerger.next(CopierHolder.java:234)
~[drill-java-exec-1.10.0.jar:1.10.0]
at
org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.doMergeAndSpill(ExternalSortBatch.java:1408)
[drill-java-exec-1.10.0.jar:1.10.0]
... 24 common frames omitted
{quote}
I'm in communication with Paul and will send him the full log file.
Thanks,
Nathan
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