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https://issues.apache.org/jira/browse/FLINK-9969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16567862#comment-16567862
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ASF GitHub Bot commented on FLINK-9969:
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tillrohrmann commented on a change in pull request #6479: [FLINK-9969][batch]
Dispose InMemorySorters created by the UnilateralSortMerger
URL: https://github.com/apache/flink/pull/6479#discussion_r207459523
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/operators/sort/CombiningUnilateralSortMergerITCase.java
##########
@@ -47,9 +37,20 @@
import org.apache.flink.runtime.util.ReusingKeyGroupedIterator;
import org.apache.flink.util.Collector;
import org.apache.flink.util.MutableObjectIterator;
+import org.apache.flink.util.TestLogger;
+
import org.junit.After;
+import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
Review comment:
You're right it's unrelated. I will remove it from the commit.
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> Unreasonable memory requirements to complete examples/batch/WordCount
> ---------------------------------------------------------------------
>
> Key: FLINK-9969
> URL: https://issues.apache.org/jira/browse/FLINK-9969
> Project: Flink
> Issue Type: Bug
> Components: ResourceManager
> Affects Versions: 1.5.0, 1.5.1, 1.5.2, 1.6.0
> Reporter: Piotr Nowojski
> Assignee: Till Rohrmann
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.5.3, 1.6.0
>
> Attachments: yarn_logs
>
>
> setup on AWS EMR:
> * 5 worker nodes (m4.4xlarge nodes)
> * 1 master node (m4.large)
> following command fails with out of memory errors:
> {noformat}
> export HADOOP_CLASSPATH=`hadoop classpath`
> ./bin/flink run -m yarn-cluster -p 20 -yn 5 -ys 4 -ytm 16000
> examples/batch/WordCount.jar{noformat}
> Only increasing memory over 17.2GB example completes. At the same time after
> disabling flip6 following command succeeds:
> {noformat}
> export HADOOP_CLASSPATH=`hadoop classpath`
> ./bin/flink run -m yarn-cluster -p 20 -yn 5 -ys 4 -ytm 1000
> examples/batch/WordCount.jar{noformat}
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