[DRILL-5519] Sort fails to spill and results in an OOM

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.10.0
• Fix Version/s: 1.12.0
• Assignee: Paul Rogers
• Reporter: Rahul Kumar Challapalli
• Created: 16/May/17 21:05
• Updated: 12/Sep/17 01:50
• Resolved: 17/Aug/17 03:34

Description

Setup :

git.commit.id.abbrev=1e0a14c
DRILL_MAX_DIRECT_MEMORY="32G"
DRILL_MAX_HEAP="4G"
No of nodes in the drill cluster : 1

The below query fails with an OOM in the "in-memory sort" code, which means the logic which decides when to spill is flawed.

0: jdbc:drill:zk=10.10.100.190:5181> ALTER SESSION SET `exec.sort.disable_managed` = false;
+-------+-------------------------------------+
|  ok   |               summary               |
+-------+-------------------------------------+
| true  | exec.sort.disable_managed updated.  |
+-------+-------------------------------------+
1 row selected (1.022 seconds)
0: jdbc:drill:zk=10.10.100.190:5181> alter session set `planner.memory.max_query_memory_per_node` = 334288000;
+-------+----------------------------------------------------+
|  ok   |                      summary                       |
+-------+----------------------------------------------------+
| true  | planner.memory.max_query_memory_per_node updated.  |
+-------+----------------------------------------------------+
1 row selected (0.369 seconds)
0: jdbc:drill:zk=10.10.100.190:5181> select count(*) from (select * from (select flatten(flatten(lst_lst)) num from dfs.`/drill/testdata/resource-manager/nested-large.json`) d order by d.num) d1 where d1.num < -1;
Error: RESOURCE ERROR: One or more nodes ran out of memory while executing the query.

Unable to allocate buffer of size 4194304 (rounded from 3200000) due to memory limit. Current allocation: 16015936
Fragment 2:2

[Error Id: 4d9cc59a-b5d1-4ca9-9b26-69d9438f0bee on qa-node190.qa.lab:31010] (state=,code=0)

Below is the exception from the logs

2017-05-16 13:46:33,233 [26e49afc-cf45-637b-acc1-a70fee7fe7e2:frag:2:2] INFO  o.a.d.e.w.fragment.FragmentExecutor - User Error Occurred: One or more nodes ran out of memory while executing the query. (Unable to allocate buffer of size 4194304 (rounded from 3200000) due to memory limit. Current allocation: 16015936)
org.apache.drill.common.exceptions.UserException: RESOURCE ERROR: One or more nodes ran out of memory while executing the query.

Unable to allocate buffer of size 4194304 (rounded from 3200000) due to memory limit. Current allocation: 16015936

[Error Id: 4d9cc59a-b5d1-4ca9-9b26-69d9438f0bee ]
        at org.apache.drill.common.exceptions.UserException$Builder.build(UserException.java:544) ~[drill-common-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:244) [drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38) [drill-common-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_111]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_111]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_111]
Caused by: org.apache.drill.exec.exception.OutOfMemoryException: Unable to allocate buffer of size 4194304 (rounded from 3200000) due to memory limit. Current allocation: 16015936
        at org.apache.drill.exec.memory.BaseAllocator.buffer(BaseAllocator.java:220) ~[drill-memory-base-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.memory.BaseAllocator.buffer(BaseAllocator.java:195) ~[drill-memory-base-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.test.generated.MSorterGen44.setup(MSortTemplate.java:91) ~[na:na]
        at org.apache.drill.exec.physical.impl.xsort.managed.MergeSort.merge(MergeSort.java:110) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.sortInMemory(ExternalSortBatch.java:1159) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.load(ExternalSortBatch.java:687) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.xsort.managed.ExternalSortBatch.innerNext(ExternalSortBatch.java:559) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:215) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:119) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:109) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.svremover.RemovingRecordBatch.innerNext(RemovingRecordBatch.java:93) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:215) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:104) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.SingleSenderCreator$SingleSenderRootExec.innerNext(SingleSenderCreator.java:92) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:94) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:234) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:227) ~[drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_111]
        at javax.security.auth.Subject.doAs(Subject.java:415) ~[na:1.7.0_111]
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1595) ~[hadoop-common-2.7.0-mapr-1607.jar:na]
        at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:227) [drill-java-exec-1.11.0-SNAPSHOT.jar:1.11.0-SNAPSHOT]
        ... 4 common frames omitted

I attached the log and profile files. The data is too large to attach here

Issue Links

• Is contained by: DRILL-5601 Rollup of External Sort memory management fixes