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https://issues.apache.org/jira/browse/SPARK-11293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16813495#comment-16813495
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yangpengyu commented on SPARK-11293:
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I hit the sam problem when I run TPCH test on spark1.6.0.
my dataset scale is SF=1000，
Environment as follows:
1Master 3 Worker,
onHeapMemory=10g,
offHeapMemory=20g,
24threads/Worker
the query3 and query17 detected memory leak.Some logs are as follows:
9/04/09 21:57:59 ERROR Executor: Managed memory leak detected; size = 536870912
bytes, TID = 2685
41 19/04/09 21:58:16 WARN TaskMemoryManager: leak 512.0 MB memory from
org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter@385b3b3f
42 19/04/09 21:58:16 ERROR Executor: Managed memory leak detected; size =
536870912 bytes, TID = 2683
43 19/04/09 21:58:16 WARN TaskMemoryManager: leak 512.0 MB memory from
org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter@35be7b55
44 19/04/09 21:58:16 ERROR Executor: Managed memory leak detected; size =
536870912 bytes, TID = 2703
45 19/04/09 21:58:20 WARN TaskMemoryManager: leak 512.0 MB memory from
org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter@50f93582
46 19/04/09 21:58:20 ERROR Executor: Managed memory leak detected; size =
536870912 bytes, TID = 2709
47 19/04/09 21:58:21 WARN TaskMemoryManager: leak 512.0 MB memory from
org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter@28e3ec7a
48 19/04/09 21:58:21 ERROR Executor: Managed memory leak detected; size =
536870912 bytes, TID = 2723
49 19/04/09 21:59:50 WARN TaskMemoryManager: leak 512.0 MB memory from
org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter@5b2f5dbc
50 19/04/09 21:59:50 ERROR Executor: Managed memory leak detected; size =
536870912 bytes, TID = 2687
51 19/04/09 22:00:50 WARN TransportChannelHandler: Exception in connection
from hw083/172.18.11.83:42989
> ExternalSorter and ExternalAppendOnlyMap should free shuffle memory in their
> stop() methods
> -------------------------------------------------------------------------------------------
>
> Key: SPARK-11293
> URL: https://issues.apache.org/jira/browse/SPARK-11293
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.3.1, 1.4.1, 1.5.1, 1.6.0
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Critical
> Fix For: 1.6.0
>
>
> I discovered multiple leaks of shuffle memory while working on my memory
> manager consolidation patch, which added the ability to do strict memory leak
> detection for the bookkeeping that used to be performed by the
> ShuffleMemoryManager. This uncovered a handful of places where tasks can
> acquire execution/shuffle memory but never release it, starving themselves of
> memory.
> Problems that I found:
> * {{ExternalSorter.stop()}} should release the sorter's shuffle/execution
> memory.
> * BlockStoreShuffleReader should call {{ExternalSorter.stop()}} using a
> {{CompletionIterator}}.
> * {{ExternalAppendOnlyMap}} exposes no equivalent of {{stop()}} for freeing
> its resources.
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