[
https://issues.apache.org/jira/browse/DRILL-545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13974574#comment-13974574
]
Ramana Inukonda Nagaraj commented on DRILL-545:
-----------------------------------------------
The query itself is very simple (Select count(*)) and on a rather small dataset.
I am just repeatedly using the same jdbc connection, statement to submit the
query.
> Memory leak when executing queries in serial
> ---------------------------------------------
>
> Key: DRILL-545
> URL: https://issues.apache.org/jira/browse/DRILL-545
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Ramana Inukonda Nagaraj
>
> While debugging another issue wrote a simple jdbc program to keep submitting
> queries to drill using JDBC string:
> jdbc:drill:schema=dfs;zk=10.10.100.171:5181,10.10.100.172:5181,10.10.100.173:5181
> After around 400 successful queries the drillbit starts throwing exceptions
> and failing.
> Using sqlline to execute a query returns the same error.
> org.apache.drill.exec.memory.OutOfMemoryException: You attempted to create a
> new child allocator with initial reservation 20000000 but only 9934592 bytes
> of memory were available.
>
> org.apache.drill.exec.memory.TopLevelAllocator.getChildAllocator(TopLevelAllocator.java:68)
>
> ~[drill-java-exec-1.0.0-m2-incubating-SNAPSHOT-rebuffed.jar:1.0.0-m2-incubating-SNAPSHOT]
>
> org.apache.drill.exec.ops.FragmentContext.<init>(FragmentContext.java:81)
> ~[drill-java-exec-1.0.0-m2-incubating-SNAPSHOT-rebuffed.jar:1.0.0-m2-incubating-SNAPSHOT]
>
> org.apache.drill.exec.work.foreman.QueryManager.runFragments(QueryManager.java:87)
>
> ~[drill-java-exec-1.0.0-m2-incubating-SNAPSHOT-rebuffed.jar:1.0.0-m2-incubating-SNAPSHOT]
>
> org.apache.drill.exec.work.foreman.Foreman.runPhysicalPlan(Foreman.java:338)
> [drill-java-exec-1.0.0-m2-incubating-SNAPSHOT-rebuffed.jar:1.0.0-m2-incubating-SNAPSHOT]
> org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:366)
> [drill-java-exec-1.0.0-m2-incubating-SNAPSHOT-rebuffed.jar:1.0.0-m2-incubating-SNAPSHOT]
> org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:176)
> [drill-java-exec-1.0.0-m2-incubating-SNAPSHOT-rebuffed.jar:1.0.0-m2-incubating-SNAPSHOT]
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> [na:1.7.0_45]
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_45]
> java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]
--
This message was sent by Atlassian JIRA
(v6.2#6252)
