walterddr commented on code in PR #10209:
URL: https://github.com/apache/pinot/pull/10209#discussion_r1094804351


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pinot-connectors/pinot-spark-connector/src/main/scala/org/apache/pinot/connector/spark/connector/PinotGrpcServerDataFetcher.scala:
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@@ -25,14 +25,15 @@ import org.apache.pinot.common.proto.Server.ServerRequest
 import org.apache.pinot.connector.spark.utils.Logging
 import org.apache.pinot.spi.config.table.TableType
 
+import java.io.Closeable
 import scala.collection.JavaConverters._
 
 /**
  * Data fetcher from Pinot Grpc server with specific segments.
  * Eg: offline-server1: segment1, segment2, segment3
  */
 private[pinot] class PinotGrpcServerDataFetcher(pinotSplit: PinotSplit)
-  extends Logging {
+  extends Logging with Closeable {

Review Comment:
   ah. I see. previously it was returning a List so thus we can close directly 
when fetchData returns. great catch. 



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