Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/4950#discussion_r26036401
--- Diff:
external/kafka/src/test/java/org/apache/spark/streaming/kafka/JavaKafkaRDDSuite.java
---
@@ -19,23 +19,19 @@
import java.io.Serializable;
import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Arrays;
-
-import org.apache.spark.SparkConf;
import scala.Tuple2;
-import junit.framework.Assert;
-
import kafka.common.TopicAndPartition;
import kafka.message.MessageAndMetadata;
import kafka.serializer.StringDecoder;
+import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.api.java.function.Function;
+import org.junit.Assert;
--- End diff --
I did a little extra cleanup in these test files that wasn't strictly
speaking related to a warning, like importing the modern JUnit classes.
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