Re: [PR] [AURON #1870][BUILD] Add `-Xfatal-warnings` to scala-maven-plugin and fix related compilation failures [auron]

["Copilot (via GitHub)" <gi...@apache.org>]

Copilot commented on code in PR #1872:
URL: https://github.com/apache/auron/pull/1872#discussion_r2704345623


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spark-extension-shims-spark/src/main/scala/org/apache/spark/sql/execution/auron/shuffle/AuronBlockStoreShuffleReader.scala:
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@@ -37,6 +37,9 @@ class AuronBlockStoreShuffleReader[K, C](
     extends AuronBlockStoreShuffleReaderBase[K, C](handle, context)
     with Logging {
 
+  // Touch mapOutputTracker to suppress -Xfatal-warnings (used in Spark 3.2+, unused in 3.0/3.1)
+  private val _ = mapOutputTracker

Review Comment:
   Instead of creating a dummy field to touch the parameter, consider using a @nowarn annotation on the class or the mapOutputTracker parameter itself. This would be clearer and more idiomatic. For example, you could annotate the mapOutputTracker parameter with @nowarn("cat=unused") in the parameter list.



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