[GitHub] [spark] dongjoon-hyun commented on issue #24132: [SPARK-27189][CORE] Add Executor metrics and memory usage instrumentation to the metrics system

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dongjoon-hyun commented on issue #24132: [SPARK-27189][CORE] Add Executor metrics and memory usage instrumentation to the metrics system
URL: https://github.com/apache/spark/pull/24132#issuecomment-563329032
 
 
   Hi, All.
   This seems to break `lint-java`.
   ```
   [ERROR] src/test/java/test/org/apache/spark/sql/JavaSaveLoadSuite.java:[28,8] (imports) UnusedImports: Unused import - org.junit.Assert.
   43
   [ERROR] src/test/java/org/apache/spark/sql/hive/JavaDataFrameSuite.java:[25,8] (imports) UnusedImports: Unused import - org.junit.Assert.
   44
   [ERROR] src/test/java/org/apache/spark/sql/hive/JavaMetastoreDataSourcesSuite.java:[30,8] (imports) UnusedImports: Unused import - org.junit.Assert.
   45
   [ERROR] src/test/java/org/apache/spark/sql/avro/JavaAvroFunctionsSuite.java:[21,8] (imports) UnusedImports: Unused import - org.junit.Assert.
   ```

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