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From Khurram Faraaz <kfar...@maprtech.com>
Subject Re: Query hangs on planning
Date Tue, 09 Aug 2016 17:16:33 GMT
Oscar, can you please report a JIRA with the required steps to reproduce
the OOM error. That way someone from the Drill team will take a look and
investigate.

For others interested here is the stack trace.

2016-08-09 16:51:14,280 [285642de-ab37-de6e-a54c-378aaa4ce50e:foreman]
ERROR o.a.drill.common.CatastrophicFailure - Catastrophic Failure Occurred,
exiting. Information message: Unable to handle out of memory condition in
Foreman.
java.lang.OutOfMemoryError: Java heap space
        at java.util.Arrays.copyOfRange(Arrays.java:2694) ~[na:1.7.0_111]
        at java.lang.String.<init>(String.java:203) ~[na:1.7.0_111]
        at java.lang.StringBuilder.toString(StringBuilder.java:405)
~[na:1.7.0_111]
        at org.apache.calcite.util.Util.newInternal(Util.java:785)
~[calcite-core-1.4.0-drill-r16-PATCHED.jar:1.4.0-drill-r16-PATCHED]
        at
org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:251)
~[calcite-core-1.4.0-drill-r16-PATCHED.jar:1.4.0-drill-r16-PATCHED]
        at
org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:808)
~[calcite-core-1.4.0-drill-r16-PATCHED.jar:1.4.0-drill-r16-PATCHED]
        at
org.apache.calcite.tools.Programs$RuleSetProgram.run(Programs.java:303)
~[calcite-core-1.4.0-drill-r16-PATCHED.jar:1.4.0-drill-r16-PATCHED]
        at
org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.transform(DefaultSqlHandler.java:404)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.transform(DefaultSqlHandler.java:343)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:240)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel(DefaultSqlHandler.java:290)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
org.apache.drill.exec.planner.sql.handlers.ExplainHandler.getPlan(ExplainHandler.java:61)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan(DrillSqlWorker.java:94)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:978)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:257)
~[drill-java-exec-1.8.0-SNAPSHOT.jar:1.8.0-SNAPSHOT]
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[na:1.7.0_111]
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_111]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_111]

Thanks,
Khurram

On Tue, Aug 9, 2016 at 7:46 PM, Oscar Morante <spacepluk@gmail.com> wrote:

> Yeah, when I uncomment only the `upload_date` lines (a dir0 alias),
> explain succeeds within ~30s.  Enabling any of the other lines triggers the
> failure.
>
> This is a log with the `upload_date` lines and `usage <> 'Test'` enabled:
> https://gist.github.com/spacepluk/d7ac11c0de6859e4bd003d2022b3c55e
>
> The client times out around here (~1.5hours):
> https://gist.github.com/spacepluk/d7ac11c0de6859e4bd003d2022
> b3c55e#file-drillbit-log-L178
>
> And it still keeps running for a while until it dies (~2.5hours):
> https://gist.github.com/spacepluk/d7ac11c0de6859e4bd003d2022
> b3c55e#file-drillbit-log-L178
>
> The memory settings for this test were:
>
>    DRILL_HEAP="4G"
>    DRILL_MAX_DIRECT_MEMORY="8G"
>
> This is on a laptop with 16G and I should probably lower it, but it seems
> a bit excessive for such a small query.  And I think I got the same results
> on a 2 node cluster with 8/16.  I'm gonna try again on the cluster to make
> sure.
>
> Thanks,
> Oscar
>
>
> On Tue, Aug 09, 2016 at 04:13:17PM +0530, Khurram Faraaz wrote:
>
>> You mentioned "*But if I uncomment the where clause then it runs for a
>> couple of hours until it runs out of memory.*"
>>
>> Can you please share the OutOfMemory details from drillbit.log and the
>> value of DRILL_MAX_DIRECT_MEMORY
>>
>> Can you also try to see what happens if you retain just this line where
>> upload_date = '2016-08-01' in your where clause, can you check if the
>> explain succeeds.
>>
>> Thanks,
>> Khurram
>>
>> On Tue, Aug 9, 2016 at 4:00 PM, Oscar Morante <spacepluk@gmail.com>
>> wrote:
>>
>> Hi there,
>>> I've been stuck with this for a while and I'm not sure if I'm running
>>> into
>>> a bug or I'm just doing something very wrong.
>>>
>>> I have this stripped-down version of my query:
>>> https://gist.github.com/spacepluk/9ab1e1a0cfec6f0efb298f023f4c805b
>>>
>>> The data is just a single file with one record (1.5K).
>>>
>>> Without changing anything, explain takes ~1sec on my machine.  But if I
>>> uncomment the where clause then it runs for a couple of hours until it
>>> runs
>>> out of memory.
>>>
>>> Also if I uncomment the where clause *and* take out the join, then it
>>> takes around 30s to plan.
>>>
>>> Any ideas?
>>> Thanks!
>>>
>>>
>>>

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