[DRILL-2921] Query with a mix of distinct and not distinct scalar aggregates runs out of memory

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Invalid
• Affects Version/s: 0.9.0
• Fix Version/s: 1.0.0
• Component/s: Execution - Relational Operators
• Assignee: Steven Phillips
• Reporter: Victoria Markman
• Created: 30/Apr/15 17:13
• Updated: 04/May/15 22:37
• Resolved: 04/May/15 22:31

Description

Query below fails with NULL pointer exception.
This bug is a request to investigate why 8GB of direct memory is not enough to execute this query.
General enhancement to fail properly when running out of memory is addressed in DRILL-2920

Query below was executed on a single node with direct memory of 8GB and planner.slice_target = 1. Table size is 100 rows (parquet file)
Increasing direct memory to 20GB allowed query to finish and return results.

Failing query:

select
        count(*),
        count(distinct c_varchar),
        count(c_varchar),
        count(distinct c_integer),
        count(c_integer),
        count(distinct c_bigint),
        count(c_bigint),
        count(distinct c_smalldecimal),
        count(c_smalldecimal),
        count(distinct c_bigdecimal),
        count(c_bigdecimal),
        count(distinct c_float),
        count(c_float),
        count(distinct c_date),
        count(c_date),
        count(distinct c_time),
        count(c_time),
        count(distinct c_timestamp),
        count(c_timestamp),
        count(distinct c_boolean),
        count(c_boolean)
from
        alltypes
;

Exception in drillbit.log:

[6e59caeb-a5f5-45f0-80db-58d220f87306 on atsqa4-133.qa.lab:31010]
org.apache.drill.common.exceptions.UserException: SYSTEM ERROR: null

Fragment 19:2

[6e59caeb-a5f5-45f0-80db-58d220f87306 on atsqa4-133.qa.lab:31010]
        at org.apache.drill.common.exceptions.UserException$Builder.build(UserException.java:465) ~[drill-common-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor.sendFinalState(FragmentExecutor.java:262) [drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:232) [drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_71]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_71]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_71]
Caused by: java.lang.NullPointerException: null
        at org.apache.drill.exec.vector.IntVector.allocateNew(IntVector.java:164) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.test.generated.HashTableGen16.allocMetadataVector(HashTableTemplate.java:746) ~[na:na]
        at org.apache.drill.exec.test.generated.HashTableGen16.setup(HashTableTemplate.java:461) ~[na:na]
        at org.apache.drill.exec.physical.impl.common.ChainedHashTable.createAndSetupHashTable(ChainedHashTable.java:223) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.test.generated.HashAggregatorGen0.setup(HashAggTemplate.java:269) ~[na:na]
        at org.apache.drill.exec.physical.impl.aggregate.HashAggBatch.createAggregatorInternal(HashAggBatch.java:234) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.aggregate.HashAggBatch.createAggregator(HashAggBatch.java:157) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.aggregate.HashAggBatch.buildSchema(HashAggBatch.java:101) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:132) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:101) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:91) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.aggregate.StreamingAggBatch.buildSchema(StreamingAggBatch.java:99) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:132) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:118) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:74) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.SingleSenderCreator$SingleSenderRootExec.innerNext(SingleSenderCreator.java:91) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:64) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:199) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:193) ~[drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_71]
        at javax.security.auth.Subject.doAs(Subject.java:415) ~[na:1.7.0_71]
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1469) ~[hadoop-common-2.4.1-mapr-1408.jar:na]
        at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:193) [drill-java-exec-0.9.0-SNAPSHOT-rebuffed.jar:0.9.0-SNAPSHOT]
        ... 3 common frames omitted

I will attach drillbit.log, alltypes data file and explain plan.