hvanhovell commented on code in PR #42473:
URL: https://github.com/apache/spark/pull/42473#discussion_r1292613320
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sql/api/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala:
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@@ -17,17 +17,42 @@
package org.apache.spark.sql.catalyst.encoders
-import java.util.concurrent.ConcurrentMap
+import java.lang.ref._
+import java.util.Objects
+import java.util.concurrent.ConcurrentHashMap
-import com.google.common.collect.MapMaker
-
-import org.apache.spark.sql.errors.QueryExecutionErrors
-import org.apache.spark.util.Utils
+import org.apache.spark.sql.errors.ExecutionErrors
+import org.apache.spark.util.SparkClassUtils
object OuterScopes {
- @transient
- lazy val outerScopes: ConcurrentMap[String, AnyRef] =
- new MapMaker().weakValues().makeMap()
+ private[this] val queue = new ReferenceQueue[AnyRef]
Review Comment:
Machinery to discard the entries for a `ClassLoader` when it is garbage
collected.
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