Github user juliuszsompolski commented on a diff in the pull request:
https://github.com/apache/spark/pull/19181#discussion_r141843914
--- Diff:
core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
---
@@ -19,10 +19,18 @@
import java.io.File;
import java.io.IOException;
+import java.io.PrintWriter;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.UUID;
+import jodd.io.StringOutputStream;
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.Matchers;
+import org.hamcrest.TypeSafeMatcher;
+import org.junit.Rule;
+import org.junit.rules.ExpectedException;
--- End diff --
nit: I think you don't use most of these imports anymore.
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